/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:41:18,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:41:18,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:41:18,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:41:18,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:41:18,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:41:18,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:41:18,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:41:18,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:41:18,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:41:18,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:41:18,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:41:18,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:41:18,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:41:18,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:41:18,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:41:18,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:41:18,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:41:18,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:41:18,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:41:18,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:41:18,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:41:18,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:41:18,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:41:18,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:41:18,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:41:18,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:41:18,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:41:18,376 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 18:41:18,412 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:41:18,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:41:18,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:41:18,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:41:18,414 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:41:18,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:41:18,414 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:41:18,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:41:18,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:41:18,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:41:18,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:41:18,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:41:18,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:41:18,419 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:41:18,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:41:18,419 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:41:18,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:41:18,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:41:18,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:41:18,421 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:41:18,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:41:18,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:41:18,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:41:18,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:41:18,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:41:18,422 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:41:18,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:41:18,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:41:18,424 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:41:18,681 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:41:18,698 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:41:18,702 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:41:18,703 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:41:18,704 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:41:18,704 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-1.i [2019-11-06 18:41:18,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87649bd7e/00bec34dcf5f4c11a08861a659c1fd6c/FLAGe5328c0b5 [2019-11-06 18:41:19,276 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:41:19,277 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy4_ground-1.i [2019-11-06 18:41:19,284 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87649bd7e/00bec34dcf5f4c11a08861a659c1fd6c/FLAGe5328c0b5 [2019-11-06 18:41:19,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87649bd7e/00bec34dcf5f4c11a08861a659c1fd6c [2019-11-06 18:41:19,592 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:41:19,593 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:41:19,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:41:19,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:41:19,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:41:19,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:41:19" (1/1) ... [2019-11-06 18:41:19,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@748fb0ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:19, skipping insertion in model container [2019-11-06 18:41:19,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:41:19" (1/1) ... [2019-11-06 18:41:19,612 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:41:19,628 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:41:19,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:41:19,832 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:41:19,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:41:19,876 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:41:19,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:19 WrapperNode [2019-11-06 18:41:19,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:41:19,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:41:19,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:41:19,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:41:19,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:19" (1/1) ... [2019-11-06 18:41:19,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:19" (1/1) ... [2019-11-06 18:41:19,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:19" (1/1) ... [2019-11-06 18:41:19,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:19" (1/1) ... [2019-11-06 18:41:19,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:19" (1/1) ... [2019-11-06 18:41:19,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:19" (1/1) ... [2019-11-06 18:41:19,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:19" (1/1) ... [2019-11-06 18:41:19,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:41:19,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:41:19,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:41:20,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:41:20,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:19" (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 18:41:20,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:41:20,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:41:20,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:41:20,056 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:41:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:41:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:41:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:41:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:41:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:41:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:41:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:41:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:41:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:41:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:41:20,382 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:41:20,382 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-06 18:41:20,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:41:20 BoogieIcfgContainer [2019-11-06 18:41:20,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:41:20,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:41:20,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:41:20,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:41:20,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:41:19" (1/3) ... [2019-11-06 18:41:20,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1efb0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:41:20, skipping insertion in model container [2019-11-06 18:41:20,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:19" (2/3) ... [2019-11-06 18:41:20,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1efb0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:41:20, skipping insertion in model container [2019-11-06 18:41:20,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:41:20" (3/3) ... [2019-11-06 18:41:20,406 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-1.i [2019-11-06 18:41:20,422 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:41:20,429 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:41:20,442 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:41:20,473 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:41:20,473 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:41:20,473 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:41:20,473 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:41:20,474 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:41:20,474 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:41:20,474 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:41:20,474 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:41:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-11-06 18:41:20,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:41:20,499 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:20,500 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:20,501 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:20,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:20,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1010407240, now seen corresponding path program 1 times [2019-11-06 18:41:20,514 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:20,515 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429731093] [2019-11-06 18:41:20,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:20,681 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 18:41:20,682 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429731093] [2019-11-06 18:41:20,683 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:41:20,684 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:41:20,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809737236] [2019-11-06 18:41:20,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:41:20,690 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:20,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:41:20,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:41:20,707 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2019-11-06 18:41:20,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:20,881 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2019-11-06 18:41:20,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:41:20,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-06 18:41:20,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:20,893 INFO L225 Difference]: With dead ends: 64 [2019-11-06 18:41:20,894 INFO L226 Difference]: Without dead ends: 31 [2019-11-06 18:41:20,902 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 18:41:20,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-06 18:41:20,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-06 18:41:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 18:41:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-11-06 18:41:20,955 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2019-11-06 18:41:20,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:20,957 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-11-06 18:41:20,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:41:20,957 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-11-06 18:41:20,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:41:20,959 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:20,960 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:20,960 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:20,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:20,961 INFO L82 PathProgramCache]: Analyzing trace with hash 555030978, now seen corresponding path program 1 times [2019-11-06 18:41:20,961 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:20,962 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122546064] [2019-11-06 18:41:20,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:21,106 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 18:41:21,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122546064] [2019-11-06 18:41:21,107 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:41:21,107 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:41:21,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473941574] [2019-11-06 18:41:21,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:41:21,110 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:21,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:41:21,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:41:21,111 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 4 states. [2019-11-06 18:41:21,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:21,210 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-11-06 18:41:21,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:41:21,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-11-06 18:41:21,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:21,212 INFO L225 Difference]: With dead ends: 56 [2019-11-06 18:41:21,212 INFO L226 Difference]: Without dead ends: 33 [2019-11-06 18:41:21,213 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 18:41:21,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-06 18:41:21,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-11-06 18:41:21,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:41:21,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-11-06 18:41:21,221 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 21 [2019-11-06 18:41:21,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:21,221 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-11-06 18:41:21,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:41:21,222 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-11-06 18:41:21,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:41:21,223 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:21,223 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:21,223 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:21,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:21,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1099948320, now seen corresponding path program 1 times [2019-11-06 18:41:21,224 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:21,224 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381446286] [2019-11-06 18:41:21,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:41:21,291 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381446286] [2019-11-06 18:41:21,291 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:41:21,291 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:41:21,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387674622] [2019-11-06 18:41:21,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:41:21,293 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:21,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:41:21,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:41:21,293 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 4 states. [2019-11-06 18:41:21,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:21,425 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2019-11-06 18:41:21,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:41:21,426 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-06 18:41:21,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:21,427 INFO L225 Difference]: With dead ends: 60 [2019-11-06 18:41:21,427 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 18:41:21,431 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 18:41:21,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 18:41:21,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2019-11-06 18:41:21,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-06 18:41:21,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-11-06 18:41:21,442 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 23 [2019-11-06 18:41:21,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:21,443 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-11-06 18:41:21,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:41:21,443 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-11-06 18:41:21,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:41:21,444 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:21,445 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:21,445 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:21,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:21,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1986876888, now seen corresponding path program 1 times [2019-11-06 18:41:21,447 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:21,447 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630989992] [2019-11-06 18:41:21,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:41:21,602 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630989992] [2019-11-06 18:41:21,603 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146827312] [2019-11-06 18:41:21,603 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 18:41:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:21,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:41:21,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:41:21,724 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:21,725 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:41:21,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624570986] [2019-11-06 18:41:21,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:41:21,727 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:21,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:41:21,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:41:21,728 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 6 states. [2019-11-06 18:41:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:21,817 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2019-11-06 18:41:21,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:41:21,818 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-11-06 18:41:21,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:21,819 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:41:21,819 INFO L226 Difference]: Without dead ends: 39 [2019-11-06 18:41:21,820 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 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 18:41:21,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-06 18:41:21,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-11-06 18:41:21,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-06 18:41:21,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2019-11-06 18:41:21,827 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 31 [2019-11-06 18:41:21,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:21,827 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2019-11-06 18:41:21,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:41:21,827 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2019-11-06 18:41:21,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-06 18:41:21,828 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:21,828 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:22,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:22,032 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:22,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:22,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1213402486, now seen corresponding path program 2 times [2019-11-06 18:41:22,033 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:22,033 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616341972] [2019-11-06 18:41:22,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:41:22,113 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616341972] [2019-11-06 18:41:22,114 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232504576] [2019-11-06 18:41:22,114 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 18:41:22,177 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:41:22,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:22,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:41:22,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:41:22,205 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:22,206 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-06 18:41:22,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650381417] [2019-11-06 18:41:22,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:41:22,207 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:22,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:41:22,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:41:22,207 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 8 states. [2019-11-06 18:41:22,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:22,390 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2019-11-06 18:41:22,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:41:22,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-06 18:41:22,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:22,391 INFO L225 Difference]: With dead ends: 80 [2019-11-06 18:41:22,392 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 18:41:22,392 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:41:22,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 18:41:22,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2019-11-06 18:41:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 18:41:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2019-11-06 18:41:22,400 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 33 [2019-11-06 18:41:22,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:22,401 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2019-11-06 18:41:22,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:41:22,401 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2019-11-06 18:41:22,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 18:41:22,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:22,402 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:22,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:22,607 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:22,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:22,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1157629812, now seen corresponding path program 3 times [2019-11-06 18:41:22,608 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:22,609 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590743959] [2019-11-06 18:41:22,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:41:22,739 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590743959] [2019-11-06 18:41:22,740 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505618871] [2019-11-06 18:41:22,740 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 18:41:22,807 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:41:22,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:22,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:41:22,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:41:22,837 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:22,837 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:41:22,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592398475] [2019-11-06 18:41:22,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:41:22,840 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:22,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:41:22,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:41:22,841 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 7 states. [2019-11-06 18:41:22,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:22,998 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2019-11-06 18:41:22,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:41:22,999 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2019-11-06 18:41:22,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:23,000 INFO L225 Difference]: With dead ends: 89 [2019-11-06 18:41:23,000 INFO L226 Difference]: Without dead ends: 60 [2019-11-06 18:41:23,001 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 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 18:41:23,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-06 18:41:23,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2019-11-06 18:41:23,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-06 18:41:23,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2019-11-06 18:41:23,009 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 43 [2019-11-06 18:41:23,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:23,010 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2019-11-06 18:41:23,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:41:23,010 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2019-11-06 18:41:23,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:41:23,012 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:23,012 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:23,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:23,224 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:23,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:23,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1761508476, now seen corresponding path program 4 times [2019-11-06 18:41:23,225 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:23,226 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742771146] [2019-11-06 18:41:23,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:41:23,327 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742771146] [2019-11-06 18:41:23,327 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34693016] [2019-11-06 18:41:23,327 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 18:41:23,390 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:41:23,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:23,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:41:23,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:41:23,415 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:23,415 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:41:23,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961792289] [2019-11-06 18:41:23,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:41:23,417 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:23,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:41:23,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:41:23,418 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 8 states. [2019-11-06 18:41:23,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:23,498 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2019-11-06 18:41:23,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:41:23,499 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2019-11-06 18:41:23,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:23,500 INFO L225 Difference]: With dead ends: 102 [2019-11-06 18:41:23,500 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:41:23,501 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 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 18:41:23,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:41:23,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-11-06 18:41:23,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 18:41:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2019-11-06 18:41:23,513 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 51 [2019-11-06 18:41:23,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:23,513 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2019-11-06 18:41:23,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:41:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2019-11-06 18:41:23,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 18:41:23,514 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:23,515 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:23,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:23,716 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:23,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:23,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1571995614, now seen corresponding path program 5 times [2019-11-06 18:41:23,717 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:23,718 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435687437] [2019-11-06 18:41:23,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:41:23,813 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435687437] [2019-11-06 18:41:23,813 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121762177] [2019-11-06 18:41:23,813 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 18:41:25,126 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-06 18:41:25,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:25,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:41:25,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-06 18:41:25,203 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:25,203 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-06 18:41:25,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539475657] [2019-11-06 18:41:25,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:41:25,204 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:25,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:41:25,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:41:25,206 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 12 states. [2019-11-06 18:41:25,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:25,448 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2019-11-06 18:41:25,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:41:25,448 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2019-11-06 18:41:25,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:25,449 INFO L225 Difference]: With dead ends: 116 [2019-11-06 18:41:25,449 INFO L226 Difference]: Without dead ends: 73 [2019-11-06 18:41:25,450 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:41:25,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-06 18:41:25,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2019-11-06 18:41:25,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-06 18:41:25,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2019-11-06 18:41:25,457 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 53 [2019-11-06 18:41:25,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:25,458 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2019-11-06 18:41:25,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:41:25,458 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2019-11-06 18:41:25,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-06 18:41:25,459 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:25,459 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:25,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:25,672 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:25,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:25,672 INFO L82 PathProgramCache]: Analyzing trace with hash -2019998664, now seen corresponding path program 6 times [2019-11-06 18:41:25,673 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:25,673 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664193292] [2019-11-06 18:41:25,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:41:25,803 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664193292] [2019-11-06 18:41:25,803 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435478270] [2019-11-06 18:41:25,803 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 18:41:25,999 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-06 18:41:25,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:26,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:41:26,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-06 18:41:26,066 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:26,067 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2019-11-06 18:41:26,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877050496] [2019-11-06 18:41:26,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:41:26,068 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:26,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:41:26,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:41:26,069 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 14 states. [2019-11-06 18:41:26,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:26,266 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2019-11-06 18:41:26,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:41:26,267 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2019-11-06 18:41:26,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:26,268 INFO L225 Difference]: With dead ends: 134 [2019-11-06 18:41:26,268 INFO L226 Difference]: Without dead ends: 83 [2019-11-06 18:41:26,269 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:41:26,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-06 18:41:26,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2019-11-06 18:41:26,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-06 18:41:26,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2019-11-06 18:41:26,281 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 63 [2019-11-06 18:41:26,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:26,281 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2019-11-06 18:41:26,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:41:26,282 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2019-11-06 18:41:26,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-06 18:41:26,283 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:26,283 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:26,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:26,487 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:26,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:26,488 INFO L82 PathProgramCache]: Analyzing trace with hash 667575502, now seen corresponding path program 7 times [2019-11-06 18:41:26,488 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:26,489 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931635158] [2019-11-06 18:41:26,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 18:41:26,593 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931635158] [2019-11-06 18:41:26,594 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487203534] [2019-11-06 18:41:26,594 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 18:41:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:26,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:41:26,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 18:41:26,698 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:26,698 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:41:26,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51193360] [2019-11-06 18:41:26,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:41:26,699 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:26,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:41:26,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:41:26,700 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 11 states. [2019-11-06 18:41:26,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:26,792 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2019-11-06 18:41:26,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:41:26,792 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 73 [2019-11-06 18:41:26,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:26,793 INFO L225 Difference]: With dead ends: 140 [2019-11-06 18:41:26,793 INFO L226 Difference]: Without dead ends: 81 [2019-11-06 18:41:26,794 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 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 18:41:26,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-06 18:41:26,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2019-11-06 18:41:26,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-06 18:41:26,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2019-11-06 18:41:26,801 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 73 [2019-11-06 18:41:26,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:26,802 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2019-11-06 18:41:26,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:41:26,802 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2019-11-06 18:41:26,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-06 18:41:26,803 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:26,803 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:27,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:27,008 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:27,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:27,009 INFO L82 PathProgramCache]: Analyzing trace with hash 268285676, now seen corresponding path program 8 times [2019-11-06 18:41:27,009 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:27,010 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193579606] [2019-11-06 18:41:27,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 18:41:27,167 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193579606] [2019-11-06 18:41:27,167 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280898751] [2019-11-06 18:41:27,168 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 18:41:27,240 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:41:27,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:27,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:41:27,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 18:41:27,269 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:27,269 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:41:27,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56056220] [2019-11-06 18:41:27,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:41:27,270 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:27,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:41:27,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:41:27,270 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 12 states. [2019-11-06 18:41:27,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:27,338 INFO L93 Difference]: Finished difference Result 142 states and 152 transitions. [2019-11-06 18:41:27,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:41:27,338 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2019-11-06 18:41:27,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:27,340 INFO L225 Difference]: With dead ends: 142 [2019-11-06 18:41:27,340 INFO L226 Difference]: Without dead ends: 83 [2019-11-06 18:41:27,341 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 76 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 18:41:27,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-06 18:41:27,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2019-11-06 18:41:27,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-06 18:41:27,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2019-11-06 18:41:27,347 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 75 [2019-11-06 18:41:27,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:27,347 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2019-11-06 18:41:27,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:41:27,347 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2019-11-06 18:41:27,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-06 18:41:27,349 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:27,349 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:27,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:27,553 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:27,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1197147766, now seen corresponding path program 9 times [2019-11-06 18:41:27,554 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:27,554 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045797578] [2019-11-06 18:41:27,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 18:41:27,665 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045797578] [2019-11-06 18:41:27,665 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143162740] [2019-11-06 18:41:27,665 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 18:41:27,956 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:41:27,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:27,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 18:41:27,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-06 18:41:28,099 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:28,099 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2019-11-06 18:41:28,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501526079] [2019-11-06 18:41:28,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:41:28,100 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:28,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:41:28,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:41:28,101 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand 22 states. [2019-11-06 18:41:28,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:28,589 INFO L93 Difference]: Finished difference Result 161 states and 180 transitions. [2019-11-06 18:41:28,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 18:41:28,589 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 77 [2019-11-06 18:41:28,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:28,590 INFO L225 Difference]: With dead ends: 161 [2019-11-06 18:41:28,590 INFO L226 Difference]: Without dead ends: 102 [2019-11-06 18:41:28,591 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:41:28,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-06 18:41:28,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2019-11-06 18:41:28,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-06 18:41:28,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2019-11-06 18:41:28,599 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 77 [2019-11-06 18:41:28,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:28,599 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2019-11-06 18:41:28,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 18:41:28,599 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2019-11-06 18:41:28,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-06 18:41:28,600 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:28,600 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:28,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:28,808 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:28,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:28,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1606788554, now seen corresponding path program 10 times [2019-11-06 18:41:28,809 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:28,809 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112414885] [2019-11-06 18:41:28,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-06 18:41:28,942 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112414885] [2019-11-06 18:41:28,942 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104014209] [2019-11-06 18:41:28,943 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 18:41:29,040 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:41:29,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:29,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:41:29,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-06 18:41:29,252 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:29,252 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2019-11-06 18:41:29,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41859534] [2019-11-06 18:41:29,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:41:29,253 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:29,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:41:29,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:41:29,254 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 22 states. [2019-11-06 18:41:29,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:29,513 INFO L93 Difference]: Finished difference Result 192 states and 206 transitions. [2019-11-06 18:41:29,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 18:41:29,514 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 97 [2019-11-06 18:41:29,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:29,515 INFO L225 Difference]: With dead ends: 192 [2019-11-06 18:41:29,515 INFO L226 Difference]: Without dead ends: 117 [2019-11-06 18:41:29,518 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:41:29,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-06 18:41:29,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2019-11-06 18:41:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-06 18:41:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2019-11-06 18:41:29,532 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 97 [2019-11-06 18:41:29,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:29,532 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2019-11-06 18:41:29,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 18:41:29,532 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2019-11-06 18:41:29,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-06 18:41:29,533 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:29,534 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:29,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:29,746 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:29,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:29,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1137104204, now seen corresponding path program 11 times [2019-11-06 18:41:29,746 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:29,746 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029039151] [2019-11-06 18:41:29,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2019-11-06 18:41:29,862 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029039151] [2019-11-06 18:41:29,862 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786003231] [2019-11-06 18:41:29,863 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