java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:47:46,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:47:46,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:47:46,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:47:46,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:47:46,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:47:46,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:47:46,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:47:46,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:47:46,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:47:46,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:47:46,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:47:46,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:47:46,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:47:46,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:47:46,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:47:46,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:47:46,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:47:46,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:47:46,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:47:46,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:47:46,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:47:46,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:47:46,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:47:46,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:47:46,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:47:46,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:47:46,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:47:46,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:47:46,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:47:46,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:47:46,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:47:46,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:47:46,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:47:46,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:47:46,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:47:46,945 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 21:47:46,964 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:47:46,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:47:46,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:47:46,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:47:46,966 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:47:46,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:47:46,966 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:47:46,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:47:46,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:47:46,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:47:46,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:47:46,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:47:46,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:47:46,968 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:47:46,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:47:46,968 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:47:46,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:47:46,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:47:46,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:47:46,969 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:47:46,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:47:46,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:47:46,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:47:46,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:47:46,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:47:46,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:47:46,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:47:46,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:47:46,971 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:47:47,240 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:47:47,251 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:47:47,255 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:47:47,256 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:47:47,256 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:47:47,257 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i [2019-10-14 21:47:47,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3bd4a5cf/7a2b1a4ca69d4c0da0f2306b0ddcd228/FLAGfd8b37c47 [2019-10-14 21:47:47,771 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:47:47,772 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i [2019-10-14 21:47:47,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3bd4a5cf/7a2b1a4ca69d4c0da0f2306b0ddcd228/FLAGfd8b37c47 [2019-10-14 21:47:48,188 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3bd4a5cf/7a2b1a4ca69d4c0da0f2306b0ddcd228 [2019-10-14 21:47:48,198 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:47:48,200 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:47:48,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:47:48,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:47:48,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:47:48,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:47:48" (1/1) ... [2019-10-14 21:47:48,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d46bbee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48, skipping insertion in model container [2019-10-14 21:47:48,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:47:48" (1/1) ... [2019-10-14 21:47:48,217 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:47:48,236 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:47:48,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:47:48,485 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:47:48,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:47:48,535 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:47:48,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48 WrapperNode [2019-10-14 21:47:48,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:47:48,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:47:48,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:47:48,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:47:48,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48" (1/1) ... [2019-10-14 21:47:48,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48" (1/1) ... [2019-10-14 21:47:48,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48" (1/1) ... [2019-10-14 21:47:48,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48" (1/1) ... [2019-10-14 21:47:48,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48" (1/1) ... [2019-10-14 21:47:48,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48" (1/1) ... [2019-10-14 21:47:48,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48" (1/1) ... [2019-10-14 21:47:48,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:47:48,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:47:48,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:47:48,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:47:48,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48" (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 21:47:48,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:47:48,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:47:48,741 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:47:48,741 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:47:48,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:47:48,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:47:48,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:47:48,742 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:47:48,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:47:48,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:47:48,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:47:48,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:47:48,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:47:48,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:47:49,021 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:47:49,021 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 21:47:49,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:47:49 BoogieIcfgContainer [2019-10-14 21:47:49,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:47:49,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:47:49,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:47:49,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:47:49,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:47:48" (1/3) ... [2019-10-14 21:47:49,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e0cbc7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:47:49, skipping insertion in model container [2019-10-14 21:47:49,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:48" (2/3) ... [2019-10-14 21:47:49,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e0cbc7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:47:49, skipping insertion in model container [2019-10-14 21:47:49,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:47:49" (3/3) ... [2019-10-14 21:47:49,034 INFO L109 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-2.i [2019-10-14 21:47:49,045 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:47:49,053 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:47:49,067 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:47:49,093 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:47:49,093 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:47:49,093 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:47:49,093 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:47:49,094 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:47:49,094 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:47:49,094 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:47:49,094 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:47:49,115 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-14 21:47:49,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 21:47:49,122 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:49,123 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:49,125 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:49,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:49,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1656037931, now seen corresponding path program 1 times [2019-10-14 21:47:49,138 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:49,139 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710150787] [2019-10-14 21:47:49,139 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:49,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:49,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:49,324 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 21:47:49,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710150787] [2019-10-14 21:47:49,327 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:49,328 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:47:49,328 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555162542] [2019-10-14 21:47:49,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:47:49,336 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:49,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:47:49,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:47:49,354 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2019-10-14 21:47:49,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:49,454 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2019-10-14 21:47:49,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:47:49,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-14 21:47:49,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:49,465 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:47:49,465 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 21:47:49,468 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 21:47:49,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 21:47:49,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-14 21:47:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:47:49,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-10-14 21:47:49,506 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 14 [2019-10-14 21:47:49,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:49,506 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-10-14 21:47:49,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:47:49,507 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-10-14 21:47:49,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 21:47:49,508 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:49,508 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:49,509 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:49,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:49,509 INFO L82 PathProgramCache]: Analyzing trace with hash -533813011, now seen corresponding path program 1 times [2019-10-14 21:47:49,509 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:49,510 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934009180] [2019-10-14 21:47:49,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:49,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:49,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:49,616 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 21:47:49,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934009180] [2019-10-14 21:47:49,617 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:49,617 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:47:49,619 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254764152] [2019-10-14 21:47:49,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:47:49,621 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:49,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:47:49,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:47:49,628 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2019-10-14 21:47:49,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:49,771 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2019-10-14 21:47:49,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:47:49,771 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-14 21:47:49,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:49,773 INFO L225 Difference]: With dead ends: 45 [2019-10-14 21:47:49,773 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 21:47:49,774 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 21:47:49,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 21:47:49,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2019-10-14 21:47:49,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:47:49,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-14 21:47:49,783 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2019-10-14 21:47:49,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:49,784 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-14 21:47:49,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:47:49,784 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-14 21:47:49,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:47:49,785 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:49,786 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:49,786 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:49,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:49,787 INFO L82 PathProgramCache]: Analyzing trace with hash -414258795, now seen corresponding path program 1 times [2019-10-14 21:47:49,787 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:49,787 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195805842] [2019-10-14 21:47:49,787 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:49,788 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:49,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:47:49,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195805842] [2019-10-14 21:47:49,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877482713] [2019-10-14 21:47:49,892 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 21:47:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:49,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:47:49,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:47:50,019 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:50,019 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:47:50,019 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129826761] [2019-10-14 21:47:50,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:47:50,029 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:50,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:47:50,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:47:50,030 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 6 states. [2019-10-14 21:47:50,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:50,184 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2019-10-14 21:47:50,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:47:50,185 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-10-14 21:47:50,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:50,186 INFO L225 Difference]: With dead ends: 56 [2019-10-14 21:47:50,186 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:47:50,187 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 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 21:47:50,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:47:50,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2019-10-14 21:47:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 21:47:50,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2019-10-14 21:47:50,196 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 22 [2019-10-14 21:47:50,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:50,197 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2019-10-14 21:47:50,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:47:50,197 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2019-10-14 21:47:50,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:47:50,198 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:50,198 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:50,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:50,404 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:50,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:50,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1579249427, now seen corresponding path program 2 times [2019-10-14 21:47:50,405 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:50,405 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664694264] [2019-10-14 21:47:50,406 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:50,406 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:50,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:47:50,561 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664694264] [2019-10-14 21:47:50,561 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167253319] [2019-10-14 21:47:50,561 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 21:47:50,608 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:50,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:50,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:47:50,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:47:50,628 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:50,628 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:47:50,628 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157681590] [2019-10-14 21:47:50,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:47:50,629 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:50,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:47:50,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:47:50,630 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 7 states. [2019-10-14 21:47:50,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:50,778 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2019-10-14 21:47:50,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:47:50,779 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-10-14 21:47:50,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:50,780 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:47:50,781 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:47:50,781 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:47:50,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:47:50,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2019-10-14 21:47:50,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 21:47:50,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2019-10-14 21:47:50,790 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 30 [2019-10-14 21:47:50,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:50,790 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2019-10-14 21:47:50,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:47:50,791 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2019-10-14 21:47:50,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:47:50,794 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:50,795 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:50,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:50,997 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:50,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:50,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1850469483, now seen corresponding path program 3 times [2019-10-14 21:47:50,997 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:50,998 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961086417] [2019-10-14 21:47:50,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:50,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:50,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 21:47:51,145 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961086417] [2019-10-14 21:47:51,145 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428864045] [2019-10-14 21:47:51,145 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 21:47:51,211 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:47:51,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:51,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:47:51,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:51,274 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-14 21:47:51,275 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:51,279 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:51,280 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:47:51,280 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2019-10-14 21:47:51,343 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 34 [2019-10-14 21:47:51,344 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:51,359 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 33 [2019-10-14 21:47:51,360 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:51,417 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:51,426 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:51,433 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 40 [2019-10-14 21:47:51,433 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:51,480 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:51,484 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 6 dim-0 vars, and 3 xjuncts. [2019-10-14 21:47:51,485 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:159, output treesize:108 [2019-10-14 21:47:51,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:47:51,579 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2019-10-14 21:47:51,580 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:51,588 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 21 [2019-10-14 21:47:51,590 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:51,596 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 27 [2019-10-14 21:47:51,598 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:51,629 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:51,634 INFO L496 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:47:51,634 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 10 variables, input treesize:140, output treesize:3 [2019-10-14 21:47:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:47:51,653 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:51,653 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-10-14 21:47:51,653 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528055242] [2019-10-14 21:47:51,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:47:51,654 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:51,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:47:51,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:47:51,656 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 10 states. [2019-10-14 21:47:52,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:52,666 INFO L93 Difference]: Finished difference Result 114 states and 151 transitions. [2019-10-14 21:47:52,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:47:52,668 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2019-10-14 21:47:52,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:52,672 INFO L225 Difference]: With dead ends: 114 [2019-10-14 21:47:52,672 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 21:47:52,674 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:47:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 21:47:52,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2019-10-14 21:47:52,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-14 21:47:52,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2019-10-14 21:47:52,684 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 38 [2019-10-14 21:47:52,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:52,684 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2019-10-14 21:47:52,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:47:52,684 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2019-10-14 21:47:52,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 21:47:52,686 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:52,686 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:52,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:52,891 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:52,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:52,891 INFO L82 PathProgramCache]: Analyzing trace with hash 304191085, now seen corresponding path program 1 times [2019-10-14 21:47:52,892 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:52,892 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537109202] [2019-10-14 21:47:52,892 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:52,893 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:52,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 21:47:53,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537109202] [2019-10-14 21:47:53,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698176799] [2019-10-14 21:47:53,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:47:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:53,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:47:53,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-14 21:47:53,087 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:53,087 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:47:53,087 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109302696] [2019-10-14 21:47:53,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:47:53,088 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:53,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:47:53,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:47:53,089 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand 9 states. [2019-10-14 21:47:53,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:53,254 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2019-10-14 21:47:53,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:47:53,255 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2019-10-14 21:47:53,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:53,256 INFO L225 Difference]: With dead ends: 104 [2019-10-14 21:47:53,256 INFO L226 Difference]: Without dead ends: 81 [2019-10-14 21:47:53,257 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 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 21:47:53,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-14 21:47:53,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2019-10-14 21:47:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 21:47:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2019-10-14 21:47:53,266 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 46 [2019-10-14 21:47:53,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:53,266 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2019-10-14 21:47:53,266 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:47:53,266 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2019-10-14 21:47:53,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:47:53,268 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:53,268 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:53,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:53,474 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:53,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:53,474 INFO L82 PathProgramCache]: Analyzing trace with hash -828408681, now seen corresponding path program 2 times [2019-10-14 21:47:53,474 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:53,474 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174942242] [2019-10-14 21:47:53,475 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:53,475 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:53,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:47:53,592 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174942242] [2019-10-14 21:47:53,593 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872608349] [2019-10-14 21:47:53,593 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 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 21:47:53,646 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:53,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:53,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:47:53,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 21:47:53,668 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:53,668 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:47:53,668 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840642005] [2019-10-14 21:47:53,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:47:53,669 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:53,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:47:53,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:47:53,670 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand 10 states. [2019-10-14 21:47:53,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:53,843 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2019-10-14 21:47:53,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:47:53,844 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2019-10-14 21:47:53,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:53,845 INFO L225 Difference]: With dead ends: 118 [2019-10-14 21:47:53,845 INFO L226 Difference]: Without dead ends: 92 [2019-10-14 21:47:53,846 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:47:53,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-14 21:47:53,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2019-10-14 21:47:53,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-14 21:47:53,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2019-10-14 21:47:53,855 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 54 [2019-10-14 21:47:53,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:53,856 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2019-10-14 21:47:53,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:47:53,856 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2019-10-14 21:47:53,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-14 21:47:53,858 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:53,858 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:54,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:54,062 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:54,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:54,063 INFO L82 PathProgramCache]: Analyzing trace with hash 893310253, now seen corresponding path program 3 times [2019-10-14 21:47:54,063 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:54,063 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837069116] [2019-10-14 21:47:54,064 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:54,064 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:54,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:47:54,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837069116] [2019-10-14 21:47:54,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773666736] [2019-10-14 21:47:54,173 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 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 21:47:54,229 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-14 21:47:54,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:54,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:47:54,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:47:54,256 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:54,256 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:47:54,256 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697111361] [2019-10-14 21:47:54,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:47:54,257 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:54,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:47:54,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:47:54,258 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand 11 states. [2019-10-14 21:47:54,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:54,434 INFO L93 Difference]: Finished difference Result 132 states and 161 transitions. [2019-10-14 21:47:54,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:47:54,435 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2019-10-14 21:47:54,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:54,437 INFO L225 Difference]: With dead ends: 132 [2019-10-14 21:47:54,437 INFO L226 Difference]: Without dead ends: 103 [2019-10-14 21:47:54,438 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 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 21:47:54,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-14 21:47:54,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2019-10-14 21:47:54,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-14 21:47:54,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2019-10-14 21:47:54,447 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 62 [2019-10-14 21:47:54,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:54,448 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2019-10-14 21:47:54,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:47:54,448 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2019-10-14 21:47:54,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-14 21:47:54,449 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:54,450 INFO L380 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:54,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:54,654 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:54,654 INFO L82 PathProgramCache]: Analyzing trace with hash -615935017, now seen corresponding path program 4 times [2019-10-14 21:47:54,655 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:54,655 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066147229] [2019-10-14 21:47:54,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:54,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:54,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-14 21:47:54,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066147229] [2019-10-14 21:47:54,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362014483] [2019-10-14 21:47:54,814 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 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 21:47:54,872 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:54,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:54,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:47:54,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-14 21:47:54,904 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:54,905 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:47:54,905 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435511274] [2019-10-14 21:47:54,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:47:54,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:54,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:47:54,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:47:54,910 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand 12 states. [2019-10-14 21:47:55,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:55,065 INFO L93 Difference]: Finished difference Result 146 states and 178 transitions. [2019-10-14 21:47:55,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:47:55,065 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2019-10-14 21:47:55,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:55,067 INFO L225 Difference]: With dead ends: 146 [2019-10-14 21:47:55,067 INFO L226 Difference]: Without dead ends: 114 [2019-10-14 21:47:55,069 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:47:55,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-10-14 21:47:55,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2019-10-14 21:47:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-14 21:47:55,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 132 transitions. [2019-10-14 21:47:55,079 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 132 transitions. Word has length 70 [2019-10-14 21:47:55,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:55,080 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 132 transitions. [2019-10-14 21:47:55,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:47:55,080 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 132 transitions. [2019-10-14 21:47:55,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 21:47:55,082 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:55,082 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:55,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:55,294 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:55,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:55,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1889092589, now seen corresponding path program 5 times [2019-10-14 21:47:55,294 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:55,294 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887001046] [2019-10-14 21:47:55,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:55,295 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:55,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-10-14 21:47:55,448 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887001046] [2019-10-14 21:47:55,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175307587] [2019-10-14 21:47:55,449 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 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 21:47:55,525 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-10-14 21:47:55,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:55,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:47:55,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-10-14 21:47:55,557 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:55,557 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:47:55,557 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779722322] [2019-10-14 21:47:55,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:47:55,558 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:55,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:47:55,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:47:55,558 INFO L87 Difference]: Start difference. First operand 106 states and 132 transitions. Second operand 13 states. [2019-10-14 21:47:55,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:55,766 INFO L93 Difference]: Finished difference Result 160 states and 195 transitions. [2019-10-14 21:47:55,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:47:55,766 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2019-10-14 21:47:55,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:55,768 INFO L225 Difference]: With dead ends: 160 [2019-10-14 21:47:55,768 INFO L226 Difference]: Without dead ends: 125 [2019-10-14 21:47:55,769 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 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 21:47:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-14 21:47:55,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 117. [2019-10-14 21:47:55,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-14 21:47:55,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 146 transitions. [2019-10-14 21:47:55,776 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 146 transitions. Word has length 78 [2019-10-14 21:47:55,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:55,777 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 146 transitions. [2019-10-14 21:47:55,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:47:55,777 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 146 transitions. [2019-10-14 21:47:55,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-14 21:47:55,778 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:55,779 INFO L380 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:55,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:55,983 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:55,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:55,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1861453033, now seen corresponding path program 6 times [2019-10-14 21:47:55,984 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:55,984 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625328605] [2019-10-14 21:47:55,985 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:55,985 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:55,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-10-14 21:47:56,125 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625328605] [2019-10-14 21:47:56,125 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709689752] [2019-10-14 21:47:56,126 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 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 21:47:56,247 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-10-14 21:47:56,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:56,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:47:56,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-10-14 21:47:56,286 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:56,286 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:47:56,286 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856657201] [2019-10-14 21:47:56,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:47:56,288 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:56,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:47:56,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:56,289 INFO L87 Difference]: Start difference. First operand 117 states and 146 transitions. Second operand 14 states. [2019-10-14 21:47:56,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:56,480 INFO L93 Difference]: Finished difference Result 174 states and 212 transitions. [2019-10-14 21:47:56,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:47:56,480 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 86 [2019-10-14 21:47:56,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:56,483 INFO L225 Difference]: With dead ends: 174 [2019-10-14 21:47:56,483 INFO L226 Difference]: Without dead ends: 136 [2019-10-14 21:47:56,484 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:56,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-10-14 21:47:56,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2019-10-14 21:47:56,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-10-14 21:47:56,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 160 transitions. [2019-10-14 21:47:56,492 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 160 transitions. Word has length 86 [2019-10-14 21:47:56,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:56,492 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 160 transitions. [2019-10-14 21:47:56,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:47:56,492 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 160 transitions. [2019-10-14 21:47:56,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-14 21:47:56,494 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:56,494 INFO L380 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:56,697 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:56,698 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:56,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:56,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1223892307, now seen corresponding path program 7 times [2019-10-14 21:47:56,699 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:56,699 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446605856] [2019-10-14 21:47:56,700 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:56,700 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:56,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:56,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2019-10-14 21:47:56,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446605856] [2019-10-14 21:47:56,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562622831] [2019-10-14 21:47:56,863 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 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 21:47:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:56,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:47:56,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-14 21:47:56,990 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:56,990 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:47:56,991 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348260314] [2019-10-14 21:47:56,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:47:56,991 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:56,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:47:56,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:47:56,992 INFO L87 Difference]: Start difference. First operand 128 states and 160 transitions. Second operand 15 states. [2019-10-14 21:47:57,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:57,274 INFO L93 Difference]: Finished difference Result 188 states and 229 transitions. [2019-10-14 21:47:57,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:47:57,274 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 94 [2019-10-14 21:47:57,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:57,276 INFO L225 Difference]: With dead ends: 188 [2019-10-14 21:47:57,276 INFO L226 Difference]: Without dead ends: 147 [2019-10-14 21:47:57,277 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:47:57,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-10-14 21:47:57,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 139. [2019-10-14 21:47:57,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-10-14 21:47:57,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 174 transitions. [2019-10-14 21:47:57,285 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 174 transitions. Word has length 94 [2019-10-14 21:47:57,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:57,286 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 174 transitions. [2019-10-14 21:47:57,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:47:57,286 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 174 transitions. [2019-10-14 21:47:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 21:47:57,291 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:57,292 INFO L380 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:57,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:57,504 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:57,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:57,504 INFO L82 PathProgramCache]: Analyzing trace with hash -141807017, now seen corresponding path program 8 times [2019-10-14 21:47:57,504 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:57,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696685723] [2019-10-14 21:47:57,505 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:57,505 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:57,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2019-10-14 21:47:57,690 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696685723] [2019-10-14 21:47:57,690 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048049516] [2019-10-14 21:47:57,690 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:57,759 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:57,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:57,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:47:57,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:47:57,802 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:57,802 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-14 21:47:57,802 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886363185] [2019-10-14 21:47:57,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:47:57,803 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:57,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:47:57,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:47:57,806 INFO L87 Difference]: Start difference. First operand 139 states and 174 transitions. Second operand 16 states. [2019-10-14 21:47:58,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:58,114 INFO L93 Difference]: Finished difference Result 202 states and 246 transitions. [2019-10-14 21:47:58,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:47:58,114 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 102 [2019-10-14 21:47:58,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:58,116 INFO L225 Difference]: With dead ends: 202 [2019-10-14 21:47:58,116 INFO L226 Difference]: Without dead ends: 158 [2019-10-14 21:47:58,117 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:47:58,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-10-14 21:47:58,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2019-10-14 21:47:58,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-10-14 21:47:58,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 188 transitions. [2019-10-14 21:47:58,124 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 188 transitions. Word has length 102 [2019-10-14 21:47:58,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:58,124 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 188 transitions. [2019-10-14 21:47:58,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:47:58,124 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 188 transitions. [2019-10-14 21:47:58,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 21:47:58,126 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:58,126 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:58,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:58,327 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:58,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:58,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1718989165, now seen corresponding path program 9 times [2019-10-14 21:47:58,328 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:58,328 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306859271] [2019-10-14 21:47:58,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:58,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:58,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-10-14 21:47:58,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306859271] [2019-10-14 21:47:58,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558175822] [2019-10-14 21:47:58,524 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:58,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2019-10-14 21:47:58,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:58,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 21:47:58,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-14 21:47:58,725 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:58,726 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2019-10-14 21:47:58,726 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174597508] [2019-10-14 21:47:58,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:47:58,727 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:58,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:47:58,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:47:58,727 INFO L87 Difference]: Start difference. First operand 150 states and 188 transitions. Second operand 17 states. [2019-10-14 21:47:59,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:59,033 INFO L93 Difference]: Finished difference Result 216 states and 263 transitions. [2019-10-14 21:47:59,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:47:59,034 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 110 [2019-10-14 21:47:59,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:59,035 INFO L225 Difference]: With dead ends: 216 [2019-10-14 21:47:59,035 INFO L226 Difference]: Without dead ends: 169 [2019-10-14 21:47:59,036 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:47:59,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-10-14 21:47:59,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 161. [2019-10-14 21:47:59,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-10-14 21:47:59,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 202 transitions. [2019-10-14 21:47:59,043 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 202 transitions. Word has length 110 [2019-10-14 21:47:59,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:59,044 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 202 transitions. [2019-10-14 21:47:59,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:47:59,044 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 202 transitions. [2019-10-14 21:47:59,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-14 21:47:59,045 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:59,045 INFO L380 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:59,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:59,250 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:59,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:59,251 INFO L82 PathProgramCache]: Analyzing trace with hash -882067049, now seen corresponding path program 10 times [2019-10-14 21:47:59,251 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:59,252 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565112284] [2019-10-14 21:47:59,252 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:59,252 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:59,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2019-10-14 21:47:59,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565112284] [2019-10-14 21:47:59,450 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822446583] [2019-10-14 21:47:59,450 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:59,519 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:59,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:59,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:47:59,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-10-14 21:47:59,551 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:59,551 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:47:59,551 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352202153] [2019-10-14 21:47:59,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:47:59,552 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:59,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:47:59,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:47:59,553 INFO L87 Difference]: Start difference. First operand 161 states and 202 transitions. Second operand 18 states. [2019-10-14 21:47:59,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:59,844 INFO L93 Difference]: Finished difference Result 230 states and 280 transitions. [2019-10-14 21:47:59,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:47:59,845 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 118 [2019-10-14 21:47:59,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:59,847 INFO L225 Difference]: With dead ends: 230 [2019-10-14 21:47:59,847 INFO L226 Difference]: Without dead ends: 180 [2019-10-14 21:47:59,848 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:47:59,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-10-14 21:47:59,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2019-10-14 21:47:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-10-14 21:47:59,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 216 transitions. [2019-10-14 21:47:59,855 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 216 transitions. Word has length 118 [2019-10-14 21:47:59,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:59,855 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 216 transitions. [2019-10-14 21:47:59,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:47:59,856 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 216 transitions. [2019-10-14 21:47:59,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 21:47:59,857 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:59,857 INFO L380 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:00,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:00,060 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:00,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:00,061 INFO L82 PathProgramCache]: Analyzing trace with hash 128954413, now seen corresponding path program 11 times [2019-10-14 21:48:00,061 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:00,061 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577187804] [2019-10-14 21:48:00,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:00,062 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:00,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2019-10-14 21:48:00,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577187804] [2019-10-14 21:48:00,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075343984] [2019-10-14 21:48:00,297 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:00,456 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-10-14 21:48:00,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:00,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:48:00,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2019-10-14 21:48:00,500 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:00,500 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:48:00,501 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375903157] [2019-10-14 21:48:00,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:48:00,502 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:00,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:48:00,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:48:00,503 INFO L87 Difference]: Start difference. First operand 172 states and 216 transitions. Second operand 19 states. [2019-10-14 21:48:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:00,822 INFO L93 Difference]: Finished difference Result 244 states and 297 transitions. [2019-10-14 21:48:00,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:48:00,823 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 126 [2019-10-14 21:48:00,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:00,825 INFO L225 Difference]: With dead ends: 244 [2019-10-14 21:48:00,825 INFO L226 Difference]: Without dead ends: 191 [2019-10-14 21:48:00,826 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:48:00,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-10-14 21:48:00,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 183. [2019-10-14 21:48:00,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2019-10-14 21:48:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 230 transitions. [2019-10-14 21:48:00,833 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 230 transitions. Word has length 126 [2019-10-14 21:48:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:00,834 INFO L462 AbstractCegarLoop]: Abstraction has 183 states and 230 transitions. [2019-10-14 21:48:00,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:48:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 230 transitions. [2019-10-14 21:48:00,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 21:48:00,835 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:00,835 INFO L380 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:01,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:01,041 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1101917993, now seen corresponding path program 12 times [2019-10-14 21:48:01,042 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:01,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344538415] [2019-10-14 21:48:01,042 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:01,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:01,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2019-10-14 21:48:01,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344538415] [2019-10-14 21:48:01,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530734028] [2019-10-14 21:48:01,257 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:01,554 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-10-14 21:48:01,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:01,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:48:01,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2019-10-14 21:48:01,590 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:01,590 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-10-14 21:48:01,590 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116716656] [2019-10-14 21:48:01,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:48:01,591 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:01,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:48:01,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:48:01,592 INFO L87 Difference]: Start difference. First operand 183 states and 230 transitions. Second operand 20 states. [2019-10-14 21:48:01,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:01,953 INFO L93 Difference]: Finished difference Result 258 states and 314 transitions. [2019-10-14 21:48:01,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:48:01,954 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 134 [2019-10-14 21:48:01,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:01,955 INFO L225 Difference]: With dead ends: 258 [2019-10-14 21:48:01,955 INFO L226 Difference]: Without dead ends: 202 [2019-10-14 21:48:01,956 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:48:01,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-10-14 21:48:01,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2019-10-14 21:48:01,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-10-14 21:48:01,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 244 transitions. [2019-10-14 21:48:01,963 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 244 transitions. Word has length 134 [2019-10-14 21:48:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:01,963 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 244 transitions. [2019-10-14 21:48:01,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:48:01,963 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 244 transitions. [2019-10-14 21:48:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-14 21:48:01,964 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:01,964 INFO L380 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:02,168 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:02,169 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:02,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:02,169 INFO L82 PathProgramCache]: Analyzing trace with hash 244768493, now seen corresponding path program 13 times [2019-10-14 21:48:02,170 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:02,170 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234539841] [2019-10-14 21:48:02,171 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:02,171 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:02,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2019-10-14 21:48:02,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234539841] [2019-10-14 21:48:02,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766966625] [2019-10-14 21:48:02,379 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:02,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:48:02,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-10-14 21:48:02,516 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:02,516 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 21:48:02,516 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587616849] [2019-10-14 21:48:02,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:48:02,517 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:02,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:48:02,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:48:02,518 INFO L87 Difference]: Start difference. First operand 194 states and 244 transitions. Second operand 21 states. [2019-10-14 21:48:02,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:02,846 INFO L93 Difference]: Finished difference Result 272 states and 331 transitions. [2019-10-14 21:48:02,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:48:02,846 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 142 [2019-10-14 21:48:02,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:02,848 INFO L225 Difference]: With dead ends: 272 [2019-10-14 21:48:02,848 INFO L226 Difference]: Without dead ends: 213 [2019-10-14 21:48:02,849 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:48:02,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-10-14 21:48:02,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2019-10-14 21:48:02,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-10-14 21:48:02,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 258 transitions. [2019-10-14 21:48:02,856 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 258 transitions. Word has length 142 [2019-10-14 21:48:02,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:02,856 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 258 transitions. [2019-10-14 21:48:02,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:48:02,856 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 258 transitions. [2019-10-14 21:48:02,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-14 21:48:02,857 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:02,857 INFO L380 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:03,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:03,061 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:03,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:03,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1226819561, now seen corresponding path program 14 times [2019-10-14 21:48:03,062 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:03,063 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654050389] [2019-10-14 21:48:03,063 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:03,063 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:03,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:03,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2019-10-14 21:48:03,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654050389] [2019-10-14 21:48:03,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181346403] [2019-10-14 21:48:03,311 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:03,401 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:03,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:03,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:48:03,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-10-14 21:48:03,446 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:03,447 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-14 21:48:03,447 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879281558] [2019-10-14 21:48:03,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:48:03,448 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:03,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:48:03,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:48:03,449 INFO L87 Difference]: Start difference. First operand 205 states and 258 transitions. Second operand 22 states. [2019-10-14 21:48:03,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:03,814 INFO L93 Difference]: Finished difference Result 286 states and 348 transitions. [2019-10-14 21:48:03,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:48:03,814 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 150 [2019-10-14 21:48:03,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:03,816 INFO L225 Difference]: With dead ends: 286 [2019-10-14 21:48:03,816 INFO L226 Difference]: Without dead ends: 224 [2019-10-14 21:48:03,817 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:48:03,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-10-14 21:48:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 216. [2019-10-14 21:48:03,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-10-14 21:48:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 272 transitions. [2019-10-14 21:48:03,824 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 272 transitions. Word has length 150 [2019-10-14 21:48:03,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:03,825 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 272 transitions. [2019-10-14 21:48:03,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:48:03,825 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 272 transitions. [2019-10-14 21:48:03,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-14 21:48:03,826 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:03,826 INFO L380 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:04,030 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:04,031 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:04,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:04,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1710801491, now seen corresponding path program 15 times [2019-10-14 21:48:04,032 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:04,032 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406170476] [2019-10-14 21:48:04,033 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:04,033 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:04,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2019-10-14 21:48:04,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406170476] [2019-10-14 21:48:04,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646200651] [2019-10-14 21:48:04,299 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:05,254 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-10-14 21:48:05,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:05,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 21:48:05,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2019-10-14 21:48:05,312 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:05,312 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2019-10-14 21:48:05,312 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009209361] [2019-10-14 21:48:05,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 21:48:05,313 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:05,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 21:48:05,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:48:05,314 INFO L87 Difference]: Start difference. First operand 216 states and 272 transitions. Second operand 23 states. [2019-10-14 21:48:05,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:05,819 INFO L93 Difference]: Finished difference Result 300 states and 365 transitions. [2019-10-14 21:48:05,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:48:05,819 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 158 [2019-10-14 21:48:05,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:05,821 INFO L225 Difference]: With dead ends: 300 [2019-10-14 21:48:05,822 INFO L226 Difference]: Without dead ends: 235 [2019-10-14 21:48:05,823 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:48:05,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-10-14 21:48:05,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 227. [2019-10-14 21:48:05,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-10-14 21:48:05,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 286 transitions. [2019-10-14 21:48:05,833 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 286 transitions. Word has length 158 [2019-10-14 21:48:05,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:05,834 INFO L462 AbstractCegarLoop]: Abstraction has 227 states and 286 transitions. [2019-10-14 21:48:05,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 21:48:05,834 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 286 transitions. [2019-10-14 21:48:05,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-14 21:48:05,836 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:05,836 INFO L380 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:06,044 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:06,044 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:06,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:06,045 INFO L82 PathProgramCache]: Analyzing trace with hash 280702807, now seen corresponding path program 16 times [2019-10-14 21:48:06,045 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:06,045 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766627698] [2019-10-14 21:48:06,046 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:06,046 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:06,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:06,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2019-10-14 21:48:06,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766627698] [2019-10-14 21:48:06,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676203800] [2019-10-14 21:48:06,513 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:06,655 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:06,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:06,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:48:06,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-10-14 21:48:06,744 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:06,744 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 21:48:06,745 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734998867] [2019-10-14 21:48:06,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:48:06,746 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:06,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:48:06,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:48:06,749 INFO L87 Difference]: Start difference. First operand 227 states and 286 transitions. Second operand 24 states. [2019-10-14 21:48:07,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:07,186 INFO L93 Difference]: Finished difference Result 314 states and 382 transitions. [2019-10-14 21:48:07,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:48:07,187 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 166 [2019-10-14 21:48:07,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:07,188 INFO L225 Difference]: With dead ends: 314 [2019-10-14 21:48:07,189 INFO L226 Difference]: Without dead ends: 246 [2019-10-14 21:48:07,189 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:48:07,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-10-14 21:48:07,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 238. [2019-10-14 21:48:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-10-14 21:48:07,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 300 transitions. [2019-10-14 21:48:07,196 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 300 transitions. Word has length 166 [2019-10-14 21:48:07,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:07,197 INFO L462 AbstractCegarLoop]: Abstraction has 238 states and 300 transitions. [2019-10-14 21:48:07,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:48:07,197 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 300 transitions. [2019-10-14 21:48:07,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-14 21:48:07,198 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:07,198 INFO L380 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:07,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:07,403 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:07,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:07,403 INFO L82 PathProgramCache]: Analyzing trace with hash 870108269, now seen corresponding path program 17 times [2019-10-14 21:48:07,403 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:07,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266801199] [2019-10-14 21:48:07,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:07,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:07,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2019-10-14 21:48:07,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266801199] [2019-10-14 21:48:07,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836718301] [2019-10-14 21:48:07,877 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:08,281 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-10-14 21:48:08,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:08,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:48:08,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2019-10-14 21:48:08,331 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:08,331 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 21:48:08,331 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216338394] [2019-10-14 21:48:08,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:48:08,332 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:08,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:48:08,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:48:08,333 INFO L87 Difference]: Start difference. First operand 238 states and 300 transitions. Second operand 25 states. [2019-10-14 21:48:08,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:08,741 INFO L93 Difference]: Finished difference Result 328 states and 399 transitions. [2019-10-14 21:48:08,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:48:08,741 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 174 [2019-10-14 21:48:08,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:08,743 INFO L225 Difference]: With dead ends: 328 [2019-10-14 21:48:08,743 INFO L226 Difference]: Without dead ends: 257 [2019-10-14 21:48:08,744 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:48:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-10-14 21:48:08,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 249. [2019-10-14 21:48:08,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2019-10-14 21:48:08,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 314 transitions. [2019-10-14 21:48:08,752 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 314 transitions. Word has length 174 [2019-10-14 21:48:08,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:08,752 INFO L462 AbstractCegarLoop]: Abstraction has 249 states and 314 transitions. [2019-10-14 21:48:08,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:48:08,753 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 314 transitions. [2019-10-14 21:48:08,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-14 21:48:08,754 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:08,754 INFO L380 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:08,967 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:08,967 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:08,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:08,967 INFO L82 PathProgramCache]: Analyzing trace with hash -595134825, now seen corresponding path program 18 times [2019-10-14 21:48:08,967 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:08,968 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060150708] [2019-10-14 21:48:08,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:08,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:08,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2019-10-14 21:48:09,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060150708] [2019-10-14 21:48:09,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529686428] [2019-10-14 21:48:09,298 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:11,237 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-10-14 21:48:11,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:11,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 21:48:11,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-10-14 21:48:11,298 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:11,298 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2019-10-14 21:48:11,298 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979976301] [2019-10-14 21:48:11,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 21:48:11,300 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:11,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 21:48:11,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:48:11,301 INFO L87 Difference]: Start difference. First operand 249 states and 314 transitions. Second operand 26 states. [2019-10-14 21:48:11,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:11,695 INFO L93 Difference]: Finished difference Result 342 states and 416 transitions. [2019-10-14 21:48:11,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:48:11,695 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 182 [2019-10-14 21:48:11,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:11,698 INFO L225 Difference]: With dead ends: 342 [2019-10-14 21:48:11,698 INFO L226 Difference]: Without dead ends: 268 [2019-10-14 21:48:11,699 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:48:11,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-10-14 21:48:11,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 260. [2019-10-14 21:48:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2019-10-14 21:48:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 328 transitions. [2019-10-14 21:48:11,707 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 328 transitions. Word has length 182 [2019-10-14 21:48:11,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:11,707 INFO L462 AbstractCegarLoop]: Abstraction has 260 states and 328 transitions. [2019-10-14 21:48:11,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 21:48:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 328 transitions. [2019-10-14 21:48:11,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-10-14 21:48:11,708 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:11,709 INFO L380 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:11,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:11,915 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:11,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:11,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1863087315, now seen corresponding path program 19 times [2019-10-14 21:48:11,915 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:11,916 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446219786] [2019-10-14 21:48:11,916 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:11,916 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:11,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2019-10-14 21:48:12,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446219786] [2019-10-14 21:48:12,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575938516] [2019-10-14 21:48:12,236 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:12,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:48:12,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-10-14 21:48:12,404 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:12,404 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-14 21:48:12,404 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897608391] [2019-10-14 21:48:12,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:48:12,407 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:12,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:48:12,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:48:12,408 INFO L87 Difference]: Start difference. First operand 260 states and 328 transitions. Second operand 27 states. [2019-10-14 21:48:13,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:13,006 INFO L93 Difference]: Finished difference Result 356 states and 433 transitions. [2019-10-14 21:48:13,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:48:13,006 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 190 [2019-10-14 21:48:13,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:13,008 INFO L225 Difference]: With dead ends: 356 [2019-10-14 21:48:13,008 INFO L226 Difference]: Without dead ends: 279 [2019-10-14 21:48:13,009 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:48:13,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2019-10-14 21:48:13,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 271. [2019-10-14 21:48:13,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2019-10-14 21:48:13,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 342 transitions. [2019-10-14 21:48:13,017 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 342 transitions. Word has length 190 [2019-10-14 21:48:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:13,018 INFO L462 AbstractCegarLoop]: Abstraction has 271 states and 342 transitions. [2019-10-14 21:48:13,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:48:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 342 transitions. [2019-10-14 21:48:13,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-10-14 21:48:13,019 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:13,020 INFO L380 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:13,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:13,223 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:13,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:13,223 INFO L82 PathProgramCache]: Analyzing trace with hash 535268823, now seen corresponding path program 20 times [2019-10-14 21:48:13,224 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:13,224 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33478302] [2019-10-14 21:48:13,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:13,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:13,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2019-10-14 21:48:13,670 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33478302] [2019-10-14 21:48:13,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692027964] [2019-10-14 21:48:13,671 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:13,777 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:13,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:13,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 21:48:13,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-10-14 21:48:13,824 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:13,825 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-10-14 21:48:13,825 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699447764] [2019-10-14 21:48:13,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:48:13,826 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:13,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:48:13,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:48:13,826 INFO L87 Difference]: Start difference. First operand 271 states and 342 transitions. Second operand 28 states. [2019-10-14 21:48:14,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:14,311 INFO L93 Difference]: Finished difference Result 370 states and 450 transitions. [2019-10-14 21:48:14,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:48:14,312 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 198 [2019-10-14 21:48:14,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:14,314 INFO L225 Difference]: With dead ends: 370 [2019-10-14 21:48:14,315 INFO L226 Difference]: Without dead ends: 290 [2019-10-14 21:48:14,315 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:48:14,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2019-10-14 21:48:14,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 282. [2019-10-14 21:48:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2019-10-14 21:48:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 356 transitions. [2019-10-14 21:48:14,323 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 356 transitions. Word has length 198 [2019-10-14 21:48:14,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:14,324 INFO L462 AbstractCegarLoop]: Abstraction has 282 states and 356 transitions. [2019-10-14 21:48:14,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:48:14,324 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 356 transitions. [2019-10-14 21:48:14,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-10-14 21:48:14,325 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:14,325 INFO L380 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:14,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:14,529 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:14,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:14,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1361541613, now seen corresponding path program 21 times [2019-10-14 21:48:14,530 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:14,530 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645919310] [2019-10-14 21:48:14,530 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:14,530 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:14,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2019-10-14 21:48:14,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645919310] [2019-10-14 21:48:14,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247663135] [2019-10-14 21:48:14,938 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:16,661 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2019-10-14 21:48:16,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:16,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 21:48:16,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2019-10-14 21:48:16,708 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:16,708 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2019-10-14 21:48:16,708 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482901326] [2019-10-14 21:48:16,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-14 21:48:16,708 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:16,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-14 21:48:16,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:48:16,709 INFO L87 Difference]: Start difference. First operand 282 states and 356 transitions. Second operand 29 states. [2019-10-14 21:48:17,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:17,249 INFO L93 Difference]: Finished difference Result 384 states and 467 transitions. [2019-10-14 21:48:17,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:48:17,249 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 206 [2019-10-14 21:48:17,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:17,251 INFO L225 Difference]: With dead ends: 384 [2019-10-14 21:48:17,252 INFO L226 Difference]: Without dead ends: 301 [2019-10-14 21:48:17,252 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:48:17,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-10-14 21:48:17,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 293. [2019-10-14 21:48:17,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2019-10-14 21:48:17,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 370 transitions. [2019-10-14 21:48:17,262 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 370 transitions. Word has length 206 [2019-10-14 21:48:17,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:17,262 INFO L462 AbstractCegarLoop]: Abstraction has 293 states and 370 transitions. [2019-10-14 21:48:17,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-14 21:48:17,263 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 370 transitions. [2019-10-14 21:48:17,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-14 21:48:17,264 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:17,264 INFO L380 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:17,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:17,471 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:17,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:17,471 INFO L82 PathProgramCache]: Analyzing trace with hash 360772887, now seen corresponding path program 22 times [2019-10-14 21:48:17,471 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:17,471 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484574734] [2019-10-14 21:48:17,471 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:17,472 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:17,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2019-10-14 21:48:17,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484574734] [2019-10-14 21:48:17,896 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677841499] [2019-10-14 21:48:17,896 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:18,029 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:18,029 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:18,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 21:48:18,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-10-14 21:48:18,090 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:18,090 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-14 21:48:18,090 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517098451] [2019-10-14 21:48:18,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:48:18,091 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:18,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:48:18,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:48:18,091 INFO L87 Difference]: Start difference. First operand 293 states and 370 transitions. Second operand 30 states. [2019-10-14 21:48:18,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:18,544 INFO L93 Difference]: Finished difference Result 398 states and 484 transitions. [2019-10-14 21:48:18,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:48:18,545 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 214 [2019-10-14 21:48:18,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:18,546 INFO L225 Difference]: With dead ends: 398 [2019-10-14 21:48:18,546 INFO L226 Difference]: Without dead ends: 312 [2019-10-14 21:48:18,547 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:48:18,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2019-10-14 21:48:18,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 304. [2019-10-14 21:48:18,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2019-10-14 21:48:18,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 384 transitions. [2019-10-14 21:48:18,555 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 384 transitions. Word has length 214 [2019-10-14 21:48:18,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:18,556 INFO L462 AbstractCegarLoop]: Abstraction has 304 states and 384 transitions. [2019-10-14 21:48:18,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:48:18,556 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 384 transitions. [2019-10-14 21:48:18,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-14 21:48:18,557 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:18,557 INFO L380 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:18,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:18,762 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:18,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:18,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1084974931, now seen corresponding path program 23 times [2019-10-14 21:48:18,763 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:18,763 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491117495] [2019-10-14 21:48:18,763 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:18,764 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:18,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:19,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1651 trivial. 0 not checked. [2019-10-14 21:48:19,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491117495] [2019-10-14 21:48:19,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446261075] [2019-10-14 21:48:19,274 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:19,896 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2019-10-14 21:48:19,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:19,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 21:48:19,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2019-10-14 21:48:19,957 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:19,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-14 21:48:19,958 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592409159] [2019-10-14 21:48:19,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 21:48:19,959 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:19,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 21:48:19,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:48:19,960 INFO L87 Difference]: Start difference. First operand 304 states and 384 transitions. Second operand 31 states. [2019-10-14 21:48:20,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:20,554 INFO L93 Difference]: Finished difference Result 412 states and 501 transitions. [2019-10-14 21:48:20,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 21:48:20,555 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 222 [2019-10-14 21:48:20,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:20,557 INFO L225 Difference]: With dead ends: 412 [2019-10-14 21:48:20,557 INFO L226 Difference]: Without dead ends: 323 [2019-10-14 21:48:20,558 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:48:20,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2019-10-14 21:48:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 315. [2019-10-14 21:48:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2019-10-14 21:48:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 398 transitions. [2019-10-14 21:48:20,566 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 398 transitions. Word has length 222 [2019-10-14 21:48:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:20,567 INFO L462 AbstractCegarLoop]: Abstraction has 315 states and 398 transitions. [2019-10-14 21:48:20,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 21:48:20,567 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 398 transitions. [2019-10-14 21:48:20,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-14 21:48:20,568 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:20,568 INFO L380 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:20,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:20,774 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:20,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:20,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1828138071, now seen corresponding path program 24 times [2019-10-14 21:48:20,774 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:20,774 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293313507] [2019-10-14 21:48:20,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:20,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:20,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1782 trivial. 0 not checked. [2019-10-14 21:48:21,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293313507] [2019-10-14 21:48:21,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045291747] [2019-10-14 21:48:21,291 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:25,789 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-10-14 21:48:25,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:25,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 21:48:25,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1782 trivial. 0 not checked. [2019-10-14 21:48:25,871 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:25,872 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2019-10-14 21:48:25,872 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143788174] [2019-10-14 21:48:25,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 21:48:25,872 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:25,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 21:48:25,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:48:25,873 INFO L87 Difference]: Start difference. First operand 315 states and 398 transitions. Second operand 32 states. [2019-10-14 21:48:26,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:26,379 INFO L93 Difference]: Finished difference Result 426 states and 518 transitions. [2019-10-14 21:48:26,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 21:48:26,379 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 230 [2019-10-14 21:48:26,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:26,382 INFO L225 Difference]: With dead ends: 426 [2019-10-14 21:48:26,383 INFO L226 Difference]: Without dead ends: 334 [2019-10-14 21:48:26,384 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:48:26,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2019-10-14 21:48:26,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 326. [2019-10-14 21:48:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2019-10-14 21:48:26,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 412 transitions. [2019-10-14 21:48:26,393 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 412 transitions. Word has length 230 [2019-10-14 21:48:26,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:26,393 INFO L462 AbstractCegarLoop]: Abstraction has 326 states and 412 transitions. [2019-10-14 21:48:26,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 21:48:26,393 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 412 transitions. [2019-10-14 21:48:26,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-10-14 21:48:26,395 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:26,395 INFO L380 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:26,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:26,603 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:26,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:26,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1856575635, now seen corresponding path program 25 times [2019-10-14 21:48:26,604 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:26,604 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163786133] [2019-10-14 21:48:26,604 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:26,604 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:26,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1918 trivial. 0 not checked. [2019-10-14 21:48:27,088 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163786133] [2019-10-14 21:48:27,088 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749968992] [2019-10-14 21:48:27,088 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:27,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 21:48:27,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2019-10-14 21:48:27,262 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:27,263 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-10-14 21:48:27,263 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771571813] [2019-10-14 21:48:27,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 21:48:27,264 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:27,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 21:48:27,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:48:27,265 INFO L87 Difference]: Start difference. First operand 326 states and 412 transitions. Second operand 33 states. [2019-10-14 21:48:27,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:27,914 INFO L93 Difference]: Finished difference Result 440 states and 535 transitions. [2019-10-14 21:48:27,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 21:48:27,914 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 238 [2019-10-14 21:48:27,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:27,917 INFO L225 Difference]: With dead ends: 440 [2019-10-14 21:48:27,917 INFO L226 Difference]: Without dead ends: 345 [2019-10-14 21:48:27,918 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:48:27,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2019-10-14 21:48:27,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 337. [2019-10-14 21:48:27,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2019-10-14 21:48:27,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 426 transitions. [2019-10-14 21:48:27,927 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 426 transitions. Word has length 238 [2019-10-14 21:48:27,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:27,927 INFO L462 AbstractCegarLoop]: Abstraction has 337 states and 426 transitions. [2019-10-14 21:48:27,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 21:48:27,927 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 426 transitions. [2019-10-14 21:48:27,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-10-14 21:48:27,929 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:27,929 INFO L380 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:28,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:28,133 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:28,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:28,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1964100713, now seen corresponding path program 26 times [2019-10-14 21:48:28,134 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:28,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178856689] [2019-10-14 21:48:28,135 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:28,135 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:28,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat