/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:41:18,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:41:18,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:41:18,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:41:18,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:41:18,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:41:18,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:41:18,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:41:18,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:41:18,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:41:18,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:41:18,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:41:18,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:41:18,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:41:18,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:41:18,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:41:18,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:41:18,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:41:18,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:41:18,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:41:18,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:41:18,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:41:18,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:41:18,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:41:18,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:41:18,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:41:18,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:41:18,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:41:18,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:41:18,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:41:18,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:41:18,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:41:18,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:41:18,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:41:18,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:41:18,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:41:18,527 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 18:41:18,556 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:41:18,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:41:18,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:41:18,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:41:18,558 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:41:18,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:41:18,558 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:41:18,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:41:18,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:41:18,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:41:18,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:41:18,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:41:18,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:41:18,560 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:41:18,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:41:18,560 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:41:18,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:41:18,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:41:18,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:41:18,561 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:41:18,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:41:18,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:41:18,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:41:18,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:41:18,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:41:18,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:41:18,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:41:18,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:41:18,562 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:41:18,970 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:41:18,993 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:41:18,996 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:41:18,998 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:41:18,999 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:41:19,000 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2019-11-06 18:41:19,077 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64a9387de/cc0da00b8c824c6fa5ffd2d020a10a5a/FLAG87d2d8422 [2019-11-06 18:41:19,555 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:41:19,555 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2019-11-06 18:41:19,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64a9387de/cc0da00b8c824c6fa5ffd2d020a10a5a/FLAG87d2d8422 [2019-11-06 18:41:19,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64a9387de/cc0da00b8c824c6fa5ffd2d020a10a5a [2019-11-06 18:41:19,926 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:41:19,928 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:41:19,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:41:19,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:41:19,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:41:19,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:41:19" (1/1) ... [2019-11-06 18:41:19,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c12eaa6 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 18:41:19,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:41:19" (1/1) ... [2019-11-06 18:41:19,950 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:41:19,972 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:41:20,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:41:20,208 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:41:20,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:41:20,249 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:41:20,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:20 WrapperNode [2019-11-06 18:41:20,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:41:20,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:41:20,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:41:20,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:41:20,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:20" (1/1) ... [2019-11-06 18:41:20,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:20" (1/1) ... [2019-11-06 18:41:20,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:20" (1/1) ... [2019-11-06 18:41:20,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:20" (1/1) ... [2019-11-06 18:41:20,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:20" (1/1) ... [2019-11-06 18:41:20,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:20" (1/1) ... [2019-11-06 18:41:20,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:20" (1/1) ... [2019-11-06 18:41:20,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:41:20,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:41:20,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:41:20,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:41:20,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:20" (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 18:41:20,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:41:20,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:41:20,454 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:41:20,454 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:41:20,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:41:20,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:41:20,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:41:20,455 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:41:20,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:41:20,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:41:20,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:41:20,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:41:20,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:41:20,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:41:20,783 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:41:20,783 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-06 18:41:20,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:41:20 BoogieIcfgContainer [2019-11-06 18:41:20,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:41:20,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:41:20,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:41:20,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:41:20,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:41:19" (1/3) ... [2019-11-06 18:41:20,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6833053e 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 18:41:20,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:20" (2/3) ... [2019-11-06 18:41:20,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6833053e 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 18:41:20,804 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 18:41:20,809 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-2.i [2019-11-06 18:41:20,822 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:41:20,835 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:41:20,847 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:41:20,873 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:41:20,873 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:41:20,873 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:41:20,874 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:41:20,874 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:41:20,874 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:41:20,874 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:41:20,874 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:41:20,893 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-11-06 18:41:20,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:41:20,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:20,900 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 18:41:20,902 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:20,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1010407240, now seen corresponding path program 1 times [2019-11-06 18:41:20,913 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:20,913 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876177585] [2019-11-06 18:41:20,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:41:21,083 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876177585] [2019-11-06 18:41:21,084 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:41:21,085 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:41:21,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390896763] [2019-11-06 18:41:21,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:41:21,091 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:21,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:41:21,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:41:21,109 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2019-11-06 18:41:21,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:21,255 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2019-11-06 18:41:21,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:41:21,257 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-06 18:41:21,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:21,267 INFO L225 Difference]: With dead ends: 64 [2019-11-06 18:41:21,267 INFO L226 Difference]: Without dead ends: 31 [2019-11-06 18:41:21,275 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 18:41:21,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-06 18:41:21,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-06 18:41:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 18:41:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-11-06 18:41:21,327 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2019-11-06 18:41:21,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:21,328 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-11-06 18:41:21,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:41:21,328 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-11-06 18:41:21,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:41:21,329 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:21,329 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 18:41:21,330 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:21,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:21,330 INFO L82 PathProgramCache]: Analyzing trace with hash 555030978, now seen corresponding path program 1 times [2019-11-06 18:41:21,331 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:21,331 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465023278] [2019-11-06 18:41:21,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:21,422 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 18:41:21,423 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465023278] [2019-11-06 18:41:21,423 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:41:21,424 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:41:21,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828037877] [2019-11-06 18:41:21,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:41:21,428 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:21,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:41:21,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:41:21,429 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 4 states. [2019-11-06 18:41:21,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:21,546 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-11-06 18:41:21,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:41:21,547 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-11-06 18:41:21,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:21,548 INFO L225 Difference]: With dead ends: 56 [2019-11-06 18:41:21,548 INFO L226 Difference]: Without dead ends: 33 [2019-11-06 18:41:21,550 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 18:41:21,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-06 18:41:21,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-11-06 18:41:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:41:21,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-11-06 18:41:21,565 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 21 [2019-11-06 18:41:21,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:21,565 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-11-06 18:41:21,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:41:21,566 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-11-06 18:41:21,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:41:21,567 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:21,567 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 18:41:21,568 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:21,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:21,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1099948320, now seen corresponding path program 1 times [2019-11-06 18:41:21,569 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:21,569 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791959792] [2019-11-06 18:41:21,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:21,690 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 18:41:21,690 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791959792] [2019-11-06 18:41:21,690 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:41:21,691 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:41:21,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386129854] [2019-11-06 18:41:21,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:41:21,692 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:21,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:41:21,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:41:21,693 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 4 states. [2019-11-06 18:41:21,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:21,825 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2019-11-06 18:41:21,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:41:21,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-06 18:41:21,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:21,827 INFO L225 Difference]: With dead ends: 60 [2019-11-06 18:41:21,827 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 18:41:21,828 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 18:41:21,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 18:41:21,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2019-11-06 18:41:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-06 18:41:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-11-06 18:41:21,835 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 23 [2019-11-06 18:41:21,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:21,836 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-11-06 18:41:21,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:41:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-11-06 18:41:21,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:41:21,837 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:21,837 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 18:41:21,838 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:21,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:21,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1986876888, now seen corresponding path program 1 times [2019-11-06 18:41:21,839 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:21,839 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812794354] [2019-11-06 18:41:21,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:21,956 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 18:41:21,956 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812794354] [2019-11-06 18:41:21,956 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421559614] [2019-11-06 18:41:21,957 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 18:41:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:22,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:41:22,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:22,049 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 18:41:22,053 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:22,053 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:41:22,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329262796] [2019-11-06 18:41:22,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:41:22,054 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:22,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:41:22,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:41:22,055 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 6 states. [2019-11-06 18:41:22,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:22,164 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2019-11-06 18:41:22,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:41:22,165 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-11-06 18:41:22,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:22,166 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:41:22,166 INFO L226 Difference]: Without dead ends: 39 [2019-11-06 18:41:22,167 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 18:41:22,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-06 18:41:22,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-11-06 18:41:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-06 18:41:22,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2019-11-06 18:41:22,181 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 31 [2019-11-06 18:41:22,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:22,181 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2019-11-06 18:41:22,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:41:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2019-11-06 18:41:22,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-06 18:41:22,184 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:22,185 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 18:41:22,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:22,397 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:22,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:22,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1213402486, now seen corresponding path program 2 times [2019-11-06 18:41:22,398 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:22,398 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266063115] [2019-11-06 18:41:22,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:22,487 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 18:41:22,487 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266063115] [2019-11-06 18:41:22,488 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105342439] [2019-11-06 18:41:22,488 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 18:41:22,552 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:41:22,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:22,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:41:22,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:22,574 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 18:41:22,575 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:22,575 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:41:22,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258176150] [2019-11-06 18:41:22,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:41:22,576 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:22,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:41:22,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:41:22,577 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2019-11-06 18:41:22,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:22,712 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2019-11-06 18:41:22,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:41:22,714 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-11-06 18:41:22,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:22,716 INFO L225 Difference]: With dead ends: 73 [2019-11-06 18:41:22,716 INFO L226 Difference]: Without dead ends: 50 [2019-11-06 18:41:22,716 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 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 18:41:22,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-06 18:41:22,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2019-11-06 18:41:22,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 18:41:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2019-11-06 18:41:22,730 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 33 [2019-11-06 18:41:22,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:22,730 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2019-11-06 18:41:22,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:41:22,733 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2019-11-06 18:41:22,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 18:41:22,734 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:22,734 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 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 18:41:22,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:22,935 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:22,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:22,936 INFO L82 PathProgramCache]: Analyzing trace with hash -496193938, now seen corresponding path program 3 times [2019-11-06 18:41:22,936 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:22,936 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177468258] [2019-11-06 18:41:22,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 18:41:23,056 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177468258] [2019-11-06 18:41:23,056 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616409611] [2019-11-06 18:41:23,056 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 18:41:23,121 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:41:23,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:23,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:41:23,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 18:41:23,161 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:23,161 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-11-06 18:41:23,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413209469] [2019-11-06 18:41:23,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:41:23,163 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:23,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:41:23,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:41:23,163 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 9 states. [2019-11-06 18:41:23,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:23,331 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2019-11-06 18:41:23,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:41:23,332 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2019-11-06 18:41:23,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:23,333 INFO L225 Difference]: With dead ends: 96 [2019-11-06 18:41:23,333 INFO L226 Difference]: Without dead ends: 61 [2019-11-06 18:41:23,334 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:41:23,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-06 18:41:23,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2019-11-06 18:41:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-06 18:41:23,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2019-11-06 18:41:23,343 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 41 [2019-11-06 18:41:23,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:23,343 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2019-11-06 18:41:23,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:41:23,343 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2019-11-06 18:41:23,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:41:23,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:23,345 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 18:41:23,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:23,552 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:23,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:23,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1761508476, now seen corresponding path program 4 times [2019-11-06 18:41:23,553 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:23,553 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131025774] [2019-11-06 18:41:23,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:23,700 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 18:41:23,701 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131025774] [2019-11-06 18:41:23,701 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623877943] [2019-11-06 18:41:23,701 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 18:41:23,764 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:41:23,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:23,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:41:23,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:23,789 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 18:41:23,789 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:23,790 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:41:23,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198715855] [2019-11-06 18:41:23,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:41:23,791 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:23,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:41:23,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:41:23,793 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 8 states. [2019-11-06 18:41:23,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:23,893 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2019-11-06 18:41:23,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:41:23,893 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2019-11-06 18:41:23,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:23,894 INFO L225 Difference]: With dead ends: 102 [2019-11-06 18:41:23,894 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:41:23,896 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 18:41:23,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:41:23,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-11-06 18:41:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 18:41:23,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2019-11-06 18:41:23,909 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 51 [2019-11-06 18:41:23,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:23,910 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2019-11-06 18:41:23,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:41:23,910 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2019-11-06 18:41:23,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 18:41:23,914 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:23,914 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 18:41:24,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:24,115 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:24,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:24,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1571995614, now seen corresponding path program 5 times [2019-11-06 18:41:24,116 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:24,116 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440089426] [2019-11-06 18:41:24,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:24,223 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 18:41:24,224 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440089426] [2019-11-06 18:41:24,224 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828065037] [2019-11-06 18:41:24,224 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 18:41:26,147 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-06 18:41:26,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:26,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:41:26,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:26,213 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 18:41:26,214 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:26,214 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-06 18:41:26,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596479002] [2019-11-06 18:41:26,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:41:26,215 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:26,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:41:26,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:41:26,216 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 12 states. [2019-11-06 18:41:26,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:26,455 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2019-11-06 18:41:26,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:41:26,455 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2019-11-06 18:41:26,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:26,456 INFO L225 Difference]: With dead ends: 116 [2019-11-06 18:41:26,456 INFO L226 Difference]: Without dead ends: 73 [2019-11-06 18:41:26,457 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 18:41:26,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-06 18:41:26,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2019-11-06 18:41:26,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-06 18:41:26,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2019-11-06 18:41:26,469 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 53 [2019-11-06 18:41:26,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:26,470 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2019-11-06 18:41:26,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:41:26,470 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2019-11-06 18:41:26,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-06 18:41:26,471 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:26,471 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 18:41:26,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:26,676 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:26,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:26,676 INFO L82 PathProgramCache]: Analyzing trace with hash -2019998664, now seen corresponding path program 6 times [2019-11-06 18:41:26,677 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:26,677 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916192069] [2019-11-06 18:41:26,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:26,859 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 18:41:26,859 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916192069] [2019-11-06 18:41:26,860 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667695303] [2019-11-06 18:41:26,860 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 18:41:27,181 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-06 18:41:27,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:27,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:41:27,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:27,203 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 18:41:27,204 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:27,204 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:41:27,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096391109] [2019-11-06 18:41:27,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:41:27,205 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:27,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:41:27,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:41:27,206 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 9 states. [2019-11-06 18:41:27,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:27,376 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2019-11-06 18:41:27,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:41:27,376 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2019-11-06 18:41:27,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:27,378 INFO L225 Difference]: With dead ends: 121 [2019-11-06 18:41:27,378 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 18:41:27,378 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 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 18:41:27,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 18:41:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2019-11-06 18:41:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-06 18:41:27,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2019-11-06 18:41:27,386 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 63 [2019-11-06 18:41:27,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:27,386 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2019-11-06 18:41:27,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:41:27,387 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2019-11-06 18:41:27,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-06 18:41:27,388 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:27,388 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 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 18:41:27,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:27,594 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:27,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:27,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1790106832, now seen corresponding path program 7 times [2019-11-06 18:41:27,595 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:27,595 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080303734] [2019-11-06 18:41:27,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 18:41:27,708 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080303734] [2019-11-06 18:41:27,708 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356723386] [2019-11-06 18:41:27,708 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 18:41:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:27,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:41:27,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 18:41:27,861 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:27,862 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-11-06 18:41:27,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064881390] [2019-11-06 18:41:27,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:41:27,866 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:27,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:41:27,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:41:27,867 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 15 states. [2019-11-06 18:41:28,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:28,139 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2019-11-06 18:41:28,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:41:28,140 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2019-11-06 18:41:28,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:28,141 INFO L225 Difference]: With dead ends: 150 [2019-11-06 18:41:28,141 INFO L226 Difference]: Without dead ends: 91 [2019-11-06 18:41:28,142 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:41:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-06 18:41:28,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2019-11-06 18:41:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-06 18:41:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2019-11-06 18:41:28,159 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 71 [2019-11-06 18:41:28,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:28,160 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2019-11-06 18:41:28,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:41:28,160 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2019-11-06 18:41:28,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-06 18:41:28,161 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:28,161 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:28,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:28,370 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:28,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:28,371 INFO L82 PathProgramCache]: Analyzing trace with hash -662131258, now seen corresponding path program 8 times [2019-11-06 18:41:28,371 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:28,371 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442017874] [2019-11-06 18:41:28,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:28,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-06 18:41:28,481 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442017874] [2019-11-06 18:41:28,481 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565878012] [2019-11-06 18:41:28,481 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 18:41:28,557 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:41:28,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:28,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:41:28,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-06 18:41:28,603 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:28,604 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:41:28,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765331578] [2019-11-06 18:41:28,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:41:28,607 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:28,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:41:28,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:41:28,608 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 11 states. [2019-11-06 18:41:28,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:28,734 INFO L93 Difference]: Finished difference Result 156 states and 166 transitions. [2019-11-06 18:41:28,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:41:28,735 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 81 [2019-11-06 18:41:28,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:28,736 INFO L225 Difference]: With dead ends: 156 [2019-11-06 18:41:28,737 INFO L226 Difference]: Without dead ends: 89 [2019-11-06 18:41:28,741 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 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 18:41:28,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-06 18:41:28,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-06 18:41:28,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-06 18:41:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2019-11-06 18:41:28,758 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 81 [2019-11-06 18:41:28,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:28,759 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2019-11-06 18:41:28,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:41:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2019-11-06 18:41:28,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-06 18:41:28,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:28,764 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:28,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:28,981 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:28,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:28,981 INFO L82 PathProgramCache]: Analyzing trace with hash 693043684, now seen corresponding path program 9 times [2019-11-06 18:41:28,981 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:28,982 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724354842] [2019-11-06 18:41:28,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-06 18:41:29,100 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724354842] [2019-11-06 18:41:29,100 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408888288] [2019-11-06 18:41:29,100 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 18:41:30,854 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-06 18:41:30,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:30,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:41:30,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2019-11-06 18:41:30,972 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:30,972 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2019-11-06 18:41:30,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982932438] [2019-11-06 18:41:30,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:41:30,973 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:30,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:41:30,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:41:30,974 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand 18 states. [2019-11-06 18:41:31,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:31,265 INFO L93 Difference]: Finished difference Result 170 states and 184 transitions. [2019-11-06 18:41:31,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:41:31,265 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2019-11-06 18:41:31,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:31,266 INFO L225 Difference]: With dead ends: 170 [2019-11-06 18:41:31,266 INFO L226 Difference]: Without dead ends: 103 [2019-11-06 18:41:31,267 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:41:31,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-06 18:41:31,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2019-11-06 18:41:31,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-06 18:41:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2019-11-06 18:41:31,274 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 83 [2019-11-06 18:41:31,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:31,274 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2019-11-06 18:41:31,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:41:31,274 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2019-11-06 18:41:31,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-06 18:41:31,275 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:31,276 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 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 18:41:31,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:31,489 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:31,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:31,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1377663866, now seen corresponding path program 10 times [2019-11-06 18:41:31,490 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:31,490 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805626326] [2019-11-06 18:41:31,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-06 18:41:31,639 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805626326] [2019-11-06 18:41:31,640 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985912976] [2019-11-06 18:41:31,640 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 18:41:31,724 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:41:31,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:31,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:41:31,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-06 18:41:31,747 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:31,747 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:41:31,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738801429] [2019-11-06 18:41:31,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:41:31,748 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:31,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:41:31,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:41:31,749 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand 13 states. [2019-11-06 18:41:31,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:31,888 INFO L93 Difference]: Finished difference Result 176 states and 186 transitions. [2019-11-06 18:41:31,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:41:31,889 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 93 [2019-11-06 18:41:31,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:31,890 INFO L225 Difference]: With dead ends: 176 [2019-11-06 18:41:31,890 INFO L226 Difference]: Without dead ends: 101 [2019-11-06 18:41:31,891 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 94 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 18:41:31,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-06 18:41:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2019-11-06 18:41:31,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-06 18:41:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2019-11-06 18:41:31,897 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 93 [2019-11-06 18:41:31,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:31,898 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2019-11-06 18:41:31,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:41:31,898 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2019-11-06 18:41:31,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-06 18:41:31,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:31,899 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 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 18:41:32,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:32,107 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:32,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:32,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1688169832, now seen corresponding path program 11 times [2019-11-06 18:41:32,108 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:32,108 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414182191] [2019-11-06 18:41:32,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-06 18:41:32,263 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414182191] [2019-11-06 18:41:32,263 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051236578] [2019-11-06 18:41:32,264 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