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_copy3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:43:15,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:43:15,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:43:15,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:43:15,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:43:15,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:43:15,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:43:15,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:43:15,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:43:15,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:43:15,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:43:15,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:43:15,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:43:15,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:43:15,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:43:15,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:43:15,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:43:15,712 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:43:15,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:43:15,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:43:15,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:43:15,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:43:15,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:43:15,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:43:15,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:43:15,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:43:15,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:43:15,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:43:15,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:43:15,740 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:43:15,740 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:43:15,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:43:15,741 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:43:15,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:43:15,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:43:15,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:43:15,748 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:43:15,766 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:43:15,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:43:15,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:43:15,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:43:15,769 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:43:15,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:43:15,770 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:43:15,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:43:15,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:43:15,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:43:15,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:43:15,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:43:15,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:43:15,772 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:43:15,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:43:15,773 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:43:15,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:43:15,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:43:15,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:43:15,773 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:43:15,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:43:15,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:43:15,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:43:15,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:43:15,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:43:15,775 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:43:15,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:43:15,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:43:15,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:43:16,041 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:43:16,060 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:43:16,064 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:43:16,066 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:43:16,066 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:43:16,067 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i [2019-10-14 21:43:16,141 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/191f2422c/0fbd74d0b7bc43acbd6a2ddd9afedbb2/FLAG21ad320d9 [2019-10-14 21:43:16,623 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:43:16,624 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i [2019-10-14 21:43:16,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/191f2422c/0fbd74d0b7bc43acbd6a2ddd9afedbb2/FLAG21ad320d9 [2019-10-14 21:43:16,987 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/191f2422c/0fbd74d0b7bc43acbd6a2ddd9afedbb2 [2019-10-14 21:43:16,997 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:43:16,999 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:43:17,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:17,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:43:17,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:43:17,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:16" (1/1) ... [2019-10-14 21:43:17,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e068800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:17, skipping insertion in model container [2019-10-14 21:43:17,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:16" (1/1) ... [2019-10-14 21:43:17,016 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:43:17,034 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:43:17,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:17,205 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:43:17,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:17,243 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:43:17,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:17 WrapperNode [2019-10-14 21:43:17,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:17,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:43:17,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:43:17,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:43:17,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:17" (1/1) ... [2019-10-14 21:43:17,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:17" (1/1) ... [2019-10-14 21:43:17,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:17" (1/1) ... [2019-10-14 21:43:17,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:17" (1/1) ... [2019-10-14 21:43:17,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:17" (1/1) ... [2019-10-14 21:43:17,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:17" (1/1) ... [2019-10-14 21:43:17,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:17" (1/1) ... [2019-10-14 21:43:17,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:43:17,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:43:17,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:43:17,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:43:17,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:43:17,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:43:17,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:43:17,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:43:17,415 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:43:17,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:43:17,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:43:17,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:43:17,416 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:43:17,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:43:17,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:43:17,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:43:17,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:43:17,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:43:17,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:43:17,749 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:43:17,750 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-14 21:43:17,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:17 BoogieIcfgContainer [2019-10-14 21:43:17,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:43:17,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:43:17,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:43:17,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:43:17,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:43:16" (1/3) ... [2019-10-14 21:43:17,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f36ac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:17, skipping insertion in model container [2019-10-14 21:43:17,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:17" (2/3) ... [2019-10-14 21:43:17,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f36ac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:17, skipping insertion in model container [2019-10-14 21:43:17,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:17" (3/3) ... [2019-10-14 21:43:17,761 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-1.i [2019-10-14 21:43:17,772 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:43:17,778 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:43:17,787 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:43:17,811 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:43:17,812 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:43:17,812 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:43:17,812 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:43:17,812 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:43:17,812 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:43:17,812 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:43:17,812 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:43:17,828 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-14 21:43:17,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:43:17,834 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:17,835 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:17,837 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:17,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:17,842 INFO L82 PathProgramCache]: Analyzing trace with hash -496428460, now seen corresponding path program 1 times [2019-10-14 21:43:17,850 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:17,851 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106808630] [2019-10-14 21:43:17,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:17,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:17,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:43:18,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106808630] [2019-10-14 21:43:18,050 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:18,050 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:43:18,050 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326897971] [2019-10-14 21:43:18,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:43:18,055 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:18,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:43:18,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:43:18,073 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-10-14 21:43:18,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:18,220 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2019-10-14 21:43:18,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:43:18,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-14 21:43:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:18,236 INFO L225 Difference]: With dead ends: 58 [2019-10-14 21:43:18,236 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:43:18,244 INFO L600 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 [2019-10-14 21:43:18,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:43:18,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-14 21:43:18,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:43:18,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-14 21:43:18,310 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2019-10-14 21:43:18,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:18,311 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-14 21:43:18,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:43:18,312 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-14 21:43:18,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:43:18,315 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:18,315 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:18,315 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:18,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1263989582, now seen corresponding path program 1 times [2019-10-14 21:43:18,317 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:18,318 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422280901] [2019-10-14 21:43:18,318 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:18,318 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:18,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:43:18,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422280901] [2019-10-14 21:43:18,463 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:18,463 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:18,463 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366607912] [2019-10-14 21:43:18,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:18,470 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:18,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:18,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:18,471 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 4 states. [2019-10-14 21:43:18,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:18,568 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2019-10-14 21:43:18,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:18,570 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-10-14 21:43:18,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:18,571 INFO L225 Difference]: With dead ends: 50 [2019-10-14 21:43:18,571 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:43:18,572 INFO L600 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 [2019-10-14 21:43:18,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:43:18,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 21:43:18,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:43:18,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-14 21:43:18,580 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 19 [2019-10-14 21:43:18,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:18,580 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-14 21:43:18,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:18,580 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-14 21:43:18,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:43:18,583 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:18,584 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:18,584 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:18,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:18,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1258945684, now seen corresponding path program 1 times [2019-10-14 21:43:18,586 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:18,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862724819] [2019-10-14 21:43:18,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:18,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:18,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:43:18,665 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862724819] [2019-10-14 21:43:18,666 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:18,666 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:18,666 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742780285] [2019-10-14 21:43:18,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:18,667 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:18,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:18,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:18,668 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 4 states. [2019-10-14 21:43:18,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:18,756 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2019-10-14 21:43:18,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:18,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-14 21:43:18,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:18,758 INFO L225 Difference]: With dead ends: 52 [2019-10-14 21:43:18,759 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:43:18,759 INFO L600 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 [2019-10-14 21:43:18,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:43:18,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2019-10-14 21:43:18,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:43:18,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-14 21:43:18,766 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 21 [2019-10-14 21:43:18,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:18,767 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-14 21:43:18,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:18,767 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-14 21:43:18,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:43:18,768 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:18,769 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:18,769 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:18,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:18,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1930458438, now seen corresponding path program 1 times [2019-10-14 21:43:18,770 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:18,770 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159757939] [2019-10-14 21:43:18,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:18,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:18,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:43:18,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159757939] [2019-10-14 21:43:18,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823211141] [2019-10-14 21:43:18,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:18,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:18,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:43:19,001 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:19,001 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:43:19,001 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761962811] [2019-10-14 21:43:19,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:43:19,003 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:19,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:43:19,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:19,004 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2019-10-14 21:43:19,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:19,118 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-10-14 21:43:19,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:43:19,119 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-10-14 21:43:19,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:19,121 INFO L225 Difference]: With dead ends: 58 [2019-10-14 21:43:19,121 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:43:19,122 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:19,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:43:19,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-14 21:43:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:43:19,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-10-14 21:43:19,132 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2019-10-14 21:43:19,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:19,133 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-10-14 21:43:19,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:43:19,133 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-10-14 21:43:19,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:43:19,135 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:19,135 INFO L380 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] [2019-10-14 21:43:19,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:19,342 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:19,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:19,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1956939620, now seen corresponding path program 2 times [2019-10-14 21:43:19,343 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:19,343 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132296075] [2019-10-14 21:43:19,344 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:19,344 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:19,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:43:19,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132296075] [2019-10-14 21:43:19,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010475742] [2019-10-14 21:43:19,461 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:19,515 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:19,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:19,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:19,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:43:19,547 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:19,547 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-14 21:43:19,547 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405832508] [2019-10-14 21:43:19,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:43:19,548 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:19,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:43:19,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:43:19,549 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-10-14 21:43:19,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:19,701 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2019-10-14 21:43:19,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:43:19,701 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2019-10-14 21:43:19,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:19,702 INFO L225 Difference]: With dead ends: 69 [2019-10-14 21:43:19,702 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:43:19,703 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:43:19,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:43:19,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-10-14 21:43:19,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 21:43:19,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-10-14 21:43:19,710 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 29 [2019-10-14 21:43:19,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:19,711 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-10-14 21:43:19,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:43:19,711 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-10-14 21:43:19,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:43:19,712 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:19,712 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-14 21:43:19,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:19,917 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:19,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:19,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1304628388, now seen corresponding path program 3 times [2019-10-14 21:43:19,918 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:19,919 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824764749] [2019-10-14 21:43:19,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:19,920 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:19,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:43:20,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824764749] [2019-10-14 21:43:20,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898437271] [2019-10-14 21:43:20,032 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:20,090 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:43:20,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:20,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:43:20,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-14 21:43:20,129 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:20,129 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-10-14 21:43:20,129 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90216423] [2019-10-14 21:43:20,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:43:20,130 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:20,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:43:20,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:43:20,131 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-10-14 21:43:20,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:20,336 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2019-10-14 21:43:20,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:43:20,336 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2019-10-14 21:43:20,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:20,337 INFO L225 Difference]: With dead ends: 83 [2019-10-14 21:43:20,337 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:43:20,340 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:43:20,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:43:20,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-10-14 21:43:20,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 21:43:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-10-14 21:43:20,354 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 37 [2019-10-14 21:43:20,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:20,354 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-10-14 21:43:20,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:43:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-10-14 21:43:20,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:43:20,356 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:20,357 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 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] [2019-10-14 21:43:20,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:20,558 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:20,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:20,559 INFO L82 PathProgramCache]: Analyzing trace with hash 849823572, now seen corresponding path program 4 times [2019-10-14 21:43:20,559 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:20,559 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248508712] [2019-10-14 21:43:20,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:20,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:20,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-14 21:43:20,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248508712] [2019-10-14 21:43:20,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982891971] [2019-10-14 21:43:20,692 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:20,748 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:20,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:20,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:43:20,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-14 21:43:20,774 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:20,775 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:43:20,775 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107551658] [2019-10-14 21:43:20,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:43:20,776 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:20,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:43:20,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:43:20,777 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2019-10-14 21:43:20,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:20,882 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2019-10-14 21:43:20,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:43:20,883 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2019-10-14 21:43:20,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:20,883 INFO L225 Difference]: With dead ends: 88 [2019-10-14 21:43:20,884 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 21:43:20,884 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:43:20,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 21:43:20,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-10-14 21:43:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:43:20,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2019-10-14 21:43:20,892 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 45 [2019-10-14 21:43:20,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:20,892 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2019-10-14 21:43:20,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:43:20,892 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2019-10-14 21:43:20,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:43:20,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:20,894 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 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] [2019-10-14 21:43:21,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:21,099 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:21,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:21,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1944957454, now seen corresponding path program 5 times [2019-10-14 21:43:21,100 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:21,100 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980138473] [2019-10-14 21:43:21,100 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:21,101 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:21,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-14 21:43:21,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980138473] [2019-10-14 21:43:21,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421311332] [2019-10-14 21:43:21,190 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:21,449 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:43:21,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:21,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:43:21,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-14 21:43:21,525 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:21,525 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-10-14 21:43:21,525 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951934592] [2019-10-14 21:43:21,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:43:21,526 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:21,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:43:21,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:43:21,527 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 13 states. [2019-10-14 21:43:21,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:21,746 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-10-14 21:43:21,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:43:21,750 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2019-10-14 21:43:21,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:21,751 INFO L225 Difference]: With dead ends: 99 [2019-10-14 21:43:21,751 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 21:43:21,752 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:43:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 21:43:21,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2019-10-14 21:43:21,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-14 21:43:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2019-10-14 21:43:21,759 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 47 [2019-10-14 21:43:21,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:21,760 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2019-10-14 21:43:21,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:43:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2019-10-14 21:43:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 21:43:21,761 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:21,761 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 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] [2019-10-14 21:43:21,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:21,974 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:21,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:21,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1609757718, now seen corresponding path program 6 times [2019-10-14 21:43:21,975 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:21,975 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548060669] [2019-10-14 21:43:21,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:21,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:21,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-14 21:43:22,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548060669] [2019-10-14 21:43:22,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974391407] [2019-10-14 21:43:22,076 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:22,226 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:43:22,226 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:22,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:43:22,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:22,297 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-14 21:43:22,297 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:22,298 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-10-14 21:43:22,298 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380856664] [2019-10-14 21:43:22,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:43:22,299 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:22,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:43:22,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:43:22,300 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 15 states. [2019-10-14 21:43:22,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:22,515 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2019-10-14 21:43:22,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:43:22,516 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2019-10-14 21:43:22,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:22,516 INFO L225 Difference]: With dead ends: 113 [2019-10-14 21:43:22,516 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:43:22,517 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:43:22,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:43:22,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2019-10-14 21:43:22,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-14 21:43:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2019-10-14 21:43:22,525 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 55 [2019-10-14 21:43:22,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:22,525 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2019-10-14 21:43:22,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:43:22,525 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2019-10-14 21:43:22,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 21:43:22,526 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:22,526 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 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] [2019-10-14 21:43:22,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:22,731 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:22,732 INFO L82 PathProgramCache]: Analyzing trace with hash 688370146, now seen corresponding path program 7 times [2019-10-14 21:43:22,732 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:22,733 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782988111] [2019-10-14 21:43:22,733 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:22,733 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:22,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-14 21:43:22,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782988111] [2019-10-14 21:43:22,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648394338] [2019-10-14 21:43:22,892 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:43:22,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-14 21:43:22,987 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:22,988 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:43:22,988 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494721631] [2019-10-14 21:43:22,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:43:22,989 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:22,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:43:22,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:43:22,989 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 12 states. [2019-10-14 21:43:23,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:23,099 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-10-14 21:43:23,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:43:23,099 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2019-10-14 21:43:23,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:23,101 INFO L225 Difference]: With dead ends: 118 [2019-10-14 21:43:23,101 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 21:43:23,102 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:43:23,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 21:43:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2019-10-14 21:43:23,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-14 21:43:23,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-10-14 21:43:23,109 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 63 [2019-10-14 21:43:23,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:23,109 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-10-14 21:43:23,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:43:23,110 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-10-14 21:43:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 21:43:23,111 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:23,111 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 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] [2019-10-14 21:43:23,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:23,316 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:23,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:23,317 INFO L82 PathProgramCache]: Analyzing trace with hash 187010304, now seen corresponding path program 8 times [2019-10-14 21:43:23,317 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:23,318 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880131106] [2019-10-14 21:43:23,318 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:23,318 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:23,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-14 21:43:23,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880131106] [2019-10-14 21:43:23,469 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866381138] [2019-10-14 21:43:23,469 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:23,539 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:23,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:23,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:43:23,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-14 21:43:23,566 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:23,566 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:43:23,566 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387746767] [2019-10-14 21:43:23,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:43:23,567 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:23,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:43:23,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:43:23,568 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 13 states. [2019-10-14 21:43:23,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:23,705 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-10-14 21:43:23,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:43:23,705 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2019-10-14 21:43:23,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:23,706 INFO L225 Difference]: With dead ends: 120 [2019-10-14 21:43:23,706 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 21:43:23,707 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:43:23,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 21:43:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-10-14 21:43:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 21:43:23,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-10-14 21:43:23,714 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 65 [2019-10-14 21:43:23,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:23,715 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-10-14 21:43:23,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:43:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-10-14 21:43:23,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 21:43:23,716 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:23,716 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 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] [2019-10-14 21:43:23,921 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:23,922 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:23,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:23,923 INFO L82 PathProgramCache]: Analyzing trace with hash -583460706, now seen corresponding path program 9 times [2019-10-14 21:43:23,923 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:23,924 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800391131] [2019-10-14 21:43:23,924 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:23,924 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:23,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-14 21:43:24,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800391131] [2019-10-14 21:43:24,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475054034] [2019-10-14 21:43:24,289 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:24,757 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:43:24,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:24,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 21:43:24,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-10-14 21:43:24,866 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:24,866 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2019-10-14 21:43:24,866 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713957002] [2019-10-14 21:43:24,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:43:24,867 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:24,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:43:24,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:43:24,868 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 21 states. [2019-10-14 21:43:25,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:25,173 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2019-10-14 21:43:25,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:43:25,174 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2019-10-14 21:43:25,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:25,174 INFO L225 Difference]: With dead ends: 134 [2019-10-14 21:43:25,175 INFO L226 Difference]: Without dead ends: 87 [2019-10-14 21:43:25,175 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:43:25,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-14 21:43:25,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-10-14 21:43:25,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-14 21:43:25,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-10-14 21:43:25,183 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 67 [2019-10-14 21:43:25,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:25,183 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-10-14 21:43:25,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:43:25,183 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-10-14 21:43:25,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:43:25,184 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:25,185 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 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] [2019-10-14 21:43:25,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:25,395 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:25,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:25,396 INFO L82 PathProgramCache]: Analyzing trace with hash 76322032, now seen corresponding path program 10 times [2019-10-14 21:43:25,396 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:25,396 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072151380] [2019-10-14 21:43:25,397 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:25,397 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:25,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-14 21:43:25,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072151380] [2019-10-14 21:43:25,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124505350] [2019-10-14 21:43:25,543 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:25,615 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:25,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:25,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:43:25,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-10-14 21:43:25,775 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:25,775 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2019-10-14 21:43:25,776 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017990271] [2019-10-14 21:43:25,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:43:25,776 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:25,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:43:25,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:43:25,777 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 22 states. [2019-10-14 21:43:26,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:26,067 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2019-10-14 21:43:26,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:43:26,068 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 81 [2019-10-14 21:43:26,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:26,069 INFO L225 Difference]: With dead ends: 157 [2019-10-14 21:43:26,069 INFO L226 Difference]: Without dead ends: 98 [2019-10-14 21:43:26,072 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:43:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-14 21:43:26,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2019-10-14 21:43:26,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-14 21:43:26,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2019-10-14 21:43:26,091 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 81 [2019-10-14 21:43:26,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:26,092 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2019-10-14 21:43:26,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:43:26,092 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2019-10-14 21:43:26,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 21:43:26,093 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:26,094 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 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] [2019-10-14 21:43:26,300 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:26,300 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:26,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:26,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1884490520, now seen corresponding path program 11 times [2019-10-14 21:43:26,301 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:26,302 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423523974] [2019-10-14 21:43:26,302 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:26,302 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:26,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:26,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-10-14 21:43:26,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423523974] [2019-10-14 21:43:26,479 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472566033] [2019-10-14 21:43:26,479 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