java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:43:21,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:43:21,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:43:21,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:43:21,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:43:21,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:43:21,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:43:21,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:43:21,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:43:21,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:43:21,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:43:21,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:43:21,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:43:21,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:43:21,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:43:21,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:43:21,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:43:21,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:43:21,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:43:21,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:43:21,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:43:21,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:43:21,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:43:21,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:43:21,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:43:21,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:43:21,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:43:21,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:43:21,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:43:21,667 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:43:21,667 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:43:21,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:43:21,668 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:43:21,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:43:21,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:43:21,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:43:21,670 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 21:43:21,702 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:43:21,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:43:21,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:43:21,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:43:21,704 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:43:21,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:43:21,707 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:43:21,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:43:21,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:43:21,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:43:21,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:43:21,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:43:21,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:43:21,709 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:43:21,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:43:21,709 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:43:21,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:43:21,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:43:21,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:43:21,710 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:43:21,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:43:21,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:43:21,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:43:21,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:43:21,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:43:21,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:43:21,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:43:21,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:43:21,712 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:43:21,970 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:43:21,985 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:43:21,989 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:43:21,990 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:43:21,991 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:43:21,992 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2019-10-14 21:43:22,072 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48ee135f6/f93248b2cec4494f8b73841d6850266b/FLAGa2dedaaa4 [2019-10-14 21:43:22,581 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:43:22,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2019-10-14 21:43:22,588 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48ee135f6/f93248b2cec4494f8b73841d6850266b/FLAGa2dedaaa4 [2019-10-14 21:43:22,985 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48ee135f6/f93248b2cec4494f8b73841d6850266b [2019-10-14 21:43:22,994 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:43:22,996 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:43:22,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:22,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:43:23,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:43:23,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:22" (1/1) ... [2019-10-14 21:43:23,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@321dbed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23, skipping insertion in model container [2019-10-14 21:43:23,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:22" (1/1) ... [2019-10-14 21:43:23,012 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:43:23,029 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:43:23,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:23,260 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:43:23,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:23,306 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:43:23,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23 WrapperNode [2019-10-14 21:43:23,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:23,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:43:23,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:43:23,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:43:23,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:43:23,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:43:23,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:43:23,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:43:23,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (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 21:43:23,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:43:23,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:43:23,496 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:43:23,496 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:43:23,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:43:23,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:43:23,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:43:23,496 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:43:23,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:43:23,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:43:23,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:43:23,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:43:23,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:43:23,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:43:23,845 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:43:23,845 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-14 21:43:23,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:23 BoogieIcfgContainer [2019-10-14 21:43:23,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:43:23,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:43:23,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:43:23,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:43:23,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:43:22" (1/3) ... [2019-10-14 21:43:23,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b59a264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:23, skipping insertion in model container [2019-10-14 21:43:23,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (2/3) ... [2019-10-14 21:43:23,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b59a264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:23, skipping insertion in model container [2019-10-14 21:43:23,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:23" (3/3) ... [2019-10-14 21:43:23,859 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-2.i [2019-10-14 21:43:23,867 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:43:23,873 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:43:23,884 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:43:23,909 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:43:23,909 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:43:23,909 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:43:23,910 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:43:23,910 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:43:23,910 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:43:23,910 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:43:23,910 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:43:23,925 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-10-14 21:43:23,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:43:23,931 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:23,932 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 21:43:23,934 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:23,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:23,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1010407240, now seen corresponding path program 1 times [2019-10-14 21:43:23,946 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:23,946 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948600512] [2019-10-14 21:43:23,946 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:23,946 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:23,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,120 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 21:43:24,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948600512] [2019-10-14 21:43:24,122 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:24,122 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:43:24,123 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67206661] [2019-10-14 21:43:24,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:43:24,128 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:24,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:43:24,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:43:24,146 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2019-10-14 21:43:24,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:24,312 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2019-10-14 21:43:24,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:43:24,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-10-14 21:43:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:24,324 INFO L225 Difference]: With dead ends: 64 [2019-10-14 21:43:24,325 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 21:43:24,331 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 21:43:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 21:43:24,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-14 21:43:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 21:43:24,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-10-14 21:43:24,394 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2019-10-14 21:43:24,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:24,396 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-10-14 21:43:24,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:43:24,397 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-10-14 21:43:24,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:43:24,399 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:24,400 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 21:43:24,400 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:24,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:24,402 INFO L82 PathProgramCache]: Analyzing trace with hash 555030978, now seen corresponding path program 1 times [2019-10-14 21:43:24,402 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:24,402 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125967646] [2019-10-14 21:43:24,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,532 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 21:43:24,533 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125967646] [2019-10-14 21:43:24,533 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:24,534 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:24,534 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797030072] [2019-10-14 21:43:24,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:24,541 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:24,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:24,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:24,542 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 4 states. [2019-10-14 21:43:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:24,668 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-10-14 21:43:24,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:24,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-14 21:43:24,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:24,670 INFO L225 Difference]: With dead ends: 56 [2019-10-14 21:43:24,670 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 21:43:24,672 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 21:43:24,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 21:43:24,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-10-14 21:43:24,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:43:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-10-14 21:43:24,680 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 21 [2019-10-14 21:43:24,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:24,680 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-10-14 21:43:24,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:24,681 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-10-14 21:43:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:43:24,682 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:24,682 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] [2019-10-14 21:43:24,682 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:24,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1099948320, now seen corresponding path program 1 times [2019-10-14 21:43:24,683 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:24,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461591260] [2019-10-14 21:43:24,684 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,684 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,800 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 21:43:24,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461591260] [2019-10-14 21:43:24,801 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:24,801 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:24,801 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044304368] [2019-10-14 21:43:24,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:24,802 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:24,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:24,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:24,803 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 4 states. [2019-10-14 21:43:24,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:24,937 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2019-10-14 21:43:24,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:24,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-14 21:43:24,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:24,940 INFO L225 Difference]: With dead ends: 60 [2019-10-14 21:43:24,941 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 21:43:24,944 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 21:43:24,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 21:43:24,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2019-10-14 21:43:24,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 21:43:24,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-10-14 21:43:24,954 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 23 [2019-10-14 21:43:24,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:24,955 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-10-14 21:43:24,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-10-14 21:43:24,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:43:24,956 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:24,957 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, 1, 1, 1, 1] [2019-10-14 21:43:24,957 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:24,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1986876888, now seen corresponding path program 1 times [2019-10-14 21:43:24,958 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:24,958 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546010410] [2019-10-14 21:43:24,958 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,959 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:43:25,082 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546010410] [2019-10-14 21:43:25,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806183337] [2019-10-14 21:43:25,083 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 21:43:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:25,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:43:25,189 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:25,189 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:43:25,190 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587465876] [2019-10-14 21:43:25,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:43:25,190 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:25,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:43:25,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:25,191 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 6 states. [2019-10-14 21:43:25,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:25,278 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2019-10-14 21:43:25,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:43:25,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-10-14 21:43:25,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:25,280 INFO L225 Difference]: With dead ends: 66 [2019-10-14 21:43:25,280 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 21:43:25,281 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 21:43:25,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-10-14 21:43:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:43:25,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2019-10-14 21:43:25,288 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 31 [2019-10-14 21:43:25,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:25,289 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2019-10-14 21:43:25,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:43:25,289 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2019-10-14 21:43:25,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 21:43:25,290 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:25,290 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, 1, 1, 1, 1] [2019-10-14 21:43:25,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:25,495 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:25,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:25,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1213402486, now seen corresponding path program 2 times [2019-10-14 21:43:25,496 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:25,497 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987496951] [2019-10-14 21:43:25,497 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:25,497 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:25,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:43:25,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987496951] [2019-10-14 21:43:25,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515388732] [2019-10-14 21:43:25,633 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 21:43:25,701 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:25,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:25,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:25,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:43:25,725 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:25,725 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:43:25,725 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053625925] [2019-10-14 21:43:25,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:43:25,726 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:25,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:43:25,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:25,727 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2019-10-14 21:43:25,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:25,875 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2019-10-14 21:43:25,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:43:25,876 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-10-14 21:43:25,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:25,877 INFO L225 Difference]: With dead ends: 73 [2019-10-14 21:43:25,877 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 21:43:25,878 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:25,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 21:43:25,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2019-10-14 21:43:25,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:43:25,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2019-10-14 21:43:25,886 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 33 [2019-10-14 21:43:25,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:25,886 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2019-10-14 21:43:25,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:43:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2019-10-14 21:43:25,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:43:25,887 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:25,888 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:26,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:26,092 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:26,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:26,093 INFO L82 PathProgramCache]: Analyzing trace with hash -496193938, now seen corresponding path program 3 times [2019-10-14 21:43:26,094 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:26,094 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875363213] [2019-10-14 21:43:26,095 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:26,095 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:26,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:43:26,215 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875363213] [2019-10-14 21:43:26,215 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777511950] [2019-10-14 21:43:26,215 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 21:43:26,280 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:43:26,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:26,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:43:26,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:43:26,339 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:26,339 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-10-14 21:43:26,340 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158122981] [2019-10-14 21:43:26,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:43:26,341 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:26,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:43:26,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:43:26,344 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 9 states. [2019-10-14 21:43:26,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:26,548 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2019-10-14 21:43:26,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:43:26,548 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2019-10-14 21:43:26,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:26,549 INFO L225 Difference]: With dead ends: 96 [2019-10-14 21:43:26,550 INFO L226 Difference]: Without dead ends: 61 [2019-10-14 21:43:26,552 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:43:26,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-14 21:43:26,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2019-10-14 21:43:26,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 21:43:26,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2019-10-14 21:43:26,566 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 41 [2019-10-14 21:43:26,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:26,567 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2019-10-14 21:43:26,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:43:26,567 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2019-10-14 21:43:26,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:43:26,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:26,569 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:26,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:26,775 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:26,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:26,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1761508476, now seen corresponding path program 4 times [2019-10-14 21:43:26,776 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:26,776 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733990684] [2019-10-14 21:43:26,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:26,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:26,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:43:26,904 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733990684] [2019-10-14 21:43:26,904 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214855278] [2019-10-14 21:43:26,904 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 21:43:26,967 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:26,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:26,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:43:26,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:43:26,999 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:26,999 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:43:26,999 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764150176] [2019-10-14 21:43:27,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:43:27,002 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:27,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:43:27,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:43:27,002 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 8 states. [2019-10-14 21:43:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:27,099 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2019-10-14 21:43:27,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:43:27,100 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2019-10-14 21:43:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:27,101 INFO L225 Difference]: With dead ends: 102 [2019-10-14 21:43:27,101 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:43:27,103 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:43:27,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:43:27,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-10-14 21:43:27,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:43:27,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2019-10-14 21:43:27,115 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 51 [2019-10-14 21:43:27,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:27,115 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2019-10-14 21:43:27,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:43:27,116 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2019-10-14 21:43:27,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-14 21:43:27,122 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:27,122 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:27,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:27,326 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:27,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:27,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1571995614, now seen corresponding path program 5 times [2019-10-14 21:43:27,327 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:27,327 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286940132] [2019-10-14 21:43:27,327 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:27,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:27,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:43:27,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286940132] [2019-10-14 21:43:27,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257522565] [2019-10-14 21:43:27,464 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 21:43:29,452 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-14 21:43:29,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:29,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:43:29,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:29,519 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 21:43:29,520 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:29,520 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-10-14 21:43:29,520 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492795885] [2019-10-14 21:43:29,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:43:29,521 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:29,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:43:29,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:43:29,522 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 12 states. [2019-10-14 21:43:29,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:29,725 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2019-10-14 21:43:29,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:43:29,727 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2019-10-14 21:43:29,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:29,728 INFO L225 Difference]: With dead ends: 116 [2019-10-14 21:43:29,729 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 21:43:29,730 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:43:29,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 21:43:29,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2019-10-14 21:43:29,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-14 21:43:29,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2019-10-14 21:43:29,738 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 53 [2019-10-14 21:43:29,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:29,738 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2019-10-14 21:43:29,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:43:29,738 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2019-10-14 21:43:29,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 21:43:29,740 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:29,740 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:29,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:29,949 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:29,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:29,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2019998664, now seen corresponding path program 6 times [2019-10-14 21:43:29,950 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:29,951 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632375212] [2019-10-14 21:43:29,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:29,952 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:29,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-14 21:43:30,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632375212] [2019-10-14 21:43:30,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882362247] [2019-10-14 21:43:30,107 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 21:43:30,454 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-10-14 21:43:30,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:30,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:43:30,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-14 21:43:30,492 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:30,492 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:43:30,493 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988867360] [2019-10-14 21:43:30,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:43:30,494 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:30,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:43:30,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:43:30,494 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 9 states. [2019-10-14 21:43:30,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:30,675 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2019-10-14 21:43:30,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:43:30,675 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2019-10-14 21:43:30,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:30,677 INFO L225 Difference]: With dead ends: 121 [2019-10-14 21:43:30,677 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 21:43:30,678 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:43:30,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 21:43:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2019-10-14 21:43:30,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-14 21:43:30,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2019-10-14 21:43:30,686 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 63 [2019-10-14 21:43:30,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:30,686 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2019-10-14 21:43:30,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:43:30,686 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2019-10-14 21:43:30,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 21:43:30,688 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:30,688 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:30,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:30,906 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:30,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:30,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1790106832, now seen corresponding path program 7 times [2019-10-14 21:43:30,907 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:30,907 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055036786] [2019-10-14 21:43:30,907 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:30,908 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:30,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:31,024 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-14 21:43:31,024 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055036786] [2019-10-14 21:43:31,024 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126426102] [2019-10-14 21:43:31,025 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 21:43:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:31,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:43:31,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-14 21:43:31,216 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:31,216 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-10-14 21:43:31,216 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457876428] [2019-10-14 21:43:31,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:43:31,218 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:31,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:43:31,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:43:31,219 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 15 states. [2019-10-14 21:43:31,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:31,554 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2019-10-14 21:43:31,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:43:31,555 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2019-10-14 21:43:31,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:31,556 INFO L225 Difference]: With dead ends: 150 [2019-10-14 21:43:31,556 INFO L226 Difference]: Without dead ends: 91 [2019-10-14 21:43:31,557 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:43:31,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-14 21:43:31,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2019-10-14 21:43:31,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-14 21:43:31,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2019-10-14 21:43:31,575 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 71 [2019-10-14 21:43:31,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:31,575 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2019-10-14 21:43:31,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:43:31,576 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2019-10-14 21:43:31,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:43:31,577 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:31,581 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:31,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:31,793 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:31,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:31,794 INFO L82 PathProgramCache]: Analyzing trace with hash -662131258, now seen corresponding path program 8 times [2019-10-14 21:43:31,794 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:31,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907024543] [2019-10-14 21:43:31,794 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:31,794 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:31,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 21:43:31,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907024543] [2019-10-14 21:43:31,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872851885] [2019-10-14 21:43:31,905 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 21:43:31,981 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:31,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:31,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:43:31,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 21:43:32,015 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:32,015 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:43:32,016 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131827742] [2019-10-14 21:43:32,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:43:32,018 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:32,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:43:32,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:43:32,018 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 11 states. [2019-10-14 21:43:32,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:32,126 INFO L93 Difference]: Finished difference Result 156 states and 166 transitions. [2019-10-14 21:43:32,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:43:32,127 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 81 [2019-10-14 21:43:32,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:32,128 INFO L225 Difference]: With dead ends: 156 [2019-10-14 21:43:32,128 INFO L226 Difference]: Without dead ends: 89 [2019-10-14 21:43:32,129 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:43:32,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-14 21:43:32,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-10-14 21:43:32,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-14 21:43:32,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2019-10-14 21:43:32,136 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 81 [2019-10-14 21:43:32,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:32,136 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2019-10-14 21:43:32,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:43:32,136 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2019-10-14 21:43:32,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-14 21:43:32,138 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:32,138 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:32,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:32,342 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:32,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:32,343 INFO L82 PathProgramCache]: Analyzing trace with hash 693043684, now seen corresponding path program 9 times [2019-10-14 21:43:32,343 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:32,344 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244662127] [2019-10-14 21:43:32,344 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:32,344 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:32,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 21:43:32,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244662127] [2019-10-14 21:43:32,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657039292] [2019-10-14 21:43:32,472 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 21:43:34,282 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-14 21:43:34,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:34,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:43:34,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2019-10-14 21:43:34,388 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:34,388 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2019-10-14 21:43:34,388 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668168223] [2019-10-14 21:43:34,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:43:34,389 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:34,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:43:34,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:43:34,390 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand 18 states. [2019-10-14 21:43:34,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:34,687 INFO L93 Difference]: Finished difference Result 170 states and 184 transitions. [2019-10-14 21:43:34,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:43:34,688 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2019-10-14 21:43:34,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:34,689 INFO L225 Difference]: With dead ends: 170 [2019-10-14 21:43:34,689 INFO L226 Difference]: Without dead ends: 103 [2019-10-14 21:43:34,690 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:43:34,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-14 21:43:34,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2019-10-14 21:43:34,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-14 21:43:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2019-10-14 21:43:34,697 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 83 [2019-10-14 21:43:34,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:34,697 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2019-10-14 21:43:34,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:43:34,697 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2019-10-14 21:43:34,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-14 21:43:34,699 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:34,699 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:34,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:34,908 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:34,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:34,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1377663866, now seen corresponding path program 10 times [2019-10-14 21:43:34,909 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:34,909 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068738377] [2019-10-14 21:43:34,909 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:34,909 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:34,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-14 21:43:35,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068738377] [2019-10-14 21:43:35,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441508737] [2019-10-14 21:43:35,048 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 21:43:35,136 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:35,136 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:35,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:43:35,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-14 21:43:35,179 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:35,179 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:43:35,180 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043501703] [2019-10-14 21:43:35,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:43:35,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:35,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:43:35,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:43:35,181 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand 13 states. [2019-10-14 21:43:35,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:35,302 INFO L93 Difference]: Finished difference Result 176 states and 186 transitions. [2019-10-14 21:43:35,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:43:35,303 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 93 [2019-10-14 21:43:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:35,304 INFO L225 Difference]: With dead ends: 176 [2019-10-14 21:43:35,304 INFO L226 Difference]: Without dead ends: 101 [2019-10-14 21:43:35,307 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:43:35,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-14 21:43:35,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2019-10-14 21:43:35,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-14 21:43:35,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2019-10-14 21:43:35,323 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 93 [2019-10-14 21:43:35,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:35,324 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2019-10-14 21:43:35,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:43:35,324 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2019-10-14 21:43:35,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 21:43:35,327 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:35,327 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:35,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:35,536 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:35,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:35,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1688169832, now seen corresponding path program 11 times [2019-10-14 21:43:35,536 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:35,536 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516211939] [2019-10-14 21:43:35,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:35,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:35,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-14 21:43:35,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516211939] [2019-10-14 21:43:35,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072731008] [2019-10-14 21:43:35,685 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