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/reducercommutativity/sep20-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:42:55,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:42:55,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:42:55,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:42:55,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:42:55,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:42:55,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:42:55,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:42:55,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:42:55,775 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:42:55,776 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:42:55,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:42:55,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:42:55,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:42:55,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:42:55,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:42:55,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:42:55,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:42:55,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:42:55,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:42:55,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:42:55,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:42:55,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:42:55,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:42:55,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:42:55,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:42:55,798 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:42:55,799 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:42:55,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:42:55,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:42:55,801 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:42:55,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:42:55,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:42:55,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:42:55,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:42:55,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:42:55,805 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 23:42:55,823 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:42:55,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:42:55,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:42:55,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:42:55,825 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:42:55,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:42:55,826 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:42:55,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:42:55,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:42:55,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:42:55,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:42:55,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:42:55,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:42:55,827 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:42:55,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:42:55,828 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:42:55,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:42:55,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:42:55,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:42:55,829 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:42:55,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:42:55,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:42:55,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:42:55,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:42:55,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:42:55,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:42:55,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:42:55,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:42:55,832 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:42:56,111 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:42:56,134 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:42:56,137 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:42:56,139 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:42:56,139 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:42:56,140 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep20-1.i [2019-10-14 23:42:56,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c44160fc1/e162c871e7b246378f6cbe23ed8e70bf/FLAG782913cf6 [2019-10-14 23:42:56,690 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:42:56,693 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep20-1.i [2019-10-14 23:42:56,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c44160fc1/e162c871e7b246378f6cbe23ed8e70bf/FLAG782913cf6 [2019-10-14 23:42:57,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c44160fc1/e162c871e7b246378f6cbe23ed8e70bf [2019-10-14 23:42:57,108 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:42:57,110 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:42:57,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:57,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:42:57,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:42:57,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:57" (1/1) ... [2019-10-14 23:42:57,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@382d0cb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:57, skipping insertion in model container [2019-10-14 23:42:57,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:57" (1/1) ... [2019-10-14 23:42:57,128 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:42:57,148 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:42:57,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:57,369 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:42:57,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:57,480 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:42:57,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:57 WrapperNode [2019-10-14 23:42:57,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:57,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:42:57,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:42:57,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:42:57,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:57" (1/1) ... [2019-10-14 23:42:57,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:57" (1/1) ... [2019-10-14 23:42:57,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:57" (1/1) ... [2019-10-14 23:42:57,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:57" (1/1) ... [2019-10-14 23:42:57,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:57" (1/1) ... [2019-10-14 23:42:57,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:57" (1/1) ... [2019-10-14 23:42:57,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:57" (1/1) ... [2019-10-14 23:42:57,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:42:57,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:42:57,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:42:57,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:42:57,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:57" (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 23:42:57,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:42:57,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:42:57,591 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-10-14 23:42:57,592 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:42:57,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:42:57,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:42:57,592 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-10-14 23:42:57,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:42:57,592 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:42:57,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:42:57,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:42:57,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:42:57,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:42:57,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:42:57,837 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:42:57,838 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 23:42:57,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:57 BoogieIcfgContainer [2019-10-14 23:42:57,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:42:57,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:42:57,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:42:57,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:42:57,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:42:57" (1/3) ... [2019-10-14 23:42:57,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d1143d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:57, skipping insertion in model container [2019-10-14 23:42:57,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:57" (2/3) ... [2019-10-14 23:42:57,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d1143d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:57, skipping insertion in model container [2019-10-14 23:42:57,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:57" (3/3) ... [2019-10-14 23:42:57,848 INFO L109 eAbstractionObserver]: Analyzing ICFG sep20-1.i [2019-10-14 23:42:57,861 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:42:57,868 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:42:57,892 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:42:57,934 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:42:57,935 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:42:57,935 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:42:57,935 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:42:57,935 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:42:57,935 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:42:57,936 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:42:57,936 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:42:57,956 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-14 23:42:57,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:42:57,965 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:57,966 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:57,968 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:57,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:57,975 INFO L82 PathProgramCache]: Analyzing trace with hash 794343521, now seen corresponding path program 1 times [2019-10-14 23:42:57,985 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:57,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110353963] [2019-10-14 23:42:57,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:57,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:57,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:42:58,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110353963] [2019-10-14 23:42:58,209 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:58,209 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:42:58,210 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203661424] [2019-10-14 23:42:58,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:58,215 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:58,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:58,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:42:58,235 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-14 23:42:58,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:58,347 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2019-10-14 23:42:58,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:58,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 23:42:58,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:58,361 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:42:58,361 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 23:42:58,366 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 23:42:58,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 23:42:58,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 23:42:58,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:42:58,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-14 23:42:58,426 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2019-10-14 23:42:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:58,427 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-14 23:42:58,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:58,428 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-14 23:42:58,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:42:58,434 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:58,434 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:58,435 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:58,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:58,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2140793590, now seen corresponding path program 1 times [2019-10-14 23:42:58,438 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:58,440 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447225957] [2019-10-14 23:42:58,440 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:58,441 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:58,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:42:58,652 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447225957] [2019-10-14 23:42:58,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924835649] [2019-10-14 23:42:58,654 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 23:42:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:42:58,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:42:58,797 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:58,797 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 23:42:58,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56350999] [2019-10-14 23:42:58,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:58,801 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:58,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:58,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:58,803 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-10-14 23:42:58,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:58,827 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-10-14 23:42:58,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:58,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 23:42:58,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:58,830 INFO L225 Difference]: With dead ends: 48 [2019-10-14 23:42:58,830 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:42:58,832 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:58,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:42:58,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-14 23:42:58,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:42:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-14 23:42:58,848 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2019-10-14 23:42:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:58,849 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-14 23:42:58,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:58,850 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-14 23:42:58,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:42:58,852 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:58,852 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:59,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:59,058 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:59,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:59,059 INFO L82 PathProgramCache]: Analyzing trace with hash 2099349144, now seen corresponding path program 1 times [2019-10-14 23:42:59,059 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:59,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152410525] [2019-10-14 23:42:59,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:59,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:59,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:42:59,168 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152410525] [2019-10-14 23:42:59,168 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286683730] [2019-10-14 23:42:59,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:42:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:42:59,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:42:59,278 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:59,278 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-14 23:42:59,278 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729812586] [2019-10-14 23:42:59,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:59,279 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:59,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:59,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:59,280 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2019-10-14 23:42:59,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:59,303 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2019-10-14 23:42:59,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:59,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-14 23:42:59,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:59,306 INFO L225 Difference]: With dead ends: 49 [2019-10-14 23:42:59,306 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:42:59,307 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 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 23:42:59,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:42:59,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-10-14 23:42:59,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:42:59,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-14 23:42:59,319 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2019-10-14 23:42:59,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:59,320 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-14 23:42:59,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:59,320 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-14 23:42:59,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 23:42:59,324 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:59,325 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:59,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:59,532 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:59,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:59,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1279819331, now seen corresponding path program 1 times [2019-10-14 23:42:59,533 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:59,534 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054526556] [2019-10-14 23:42:59,534 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:59,535 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:59,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:42:59,655 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054526556] [2019-10-14 23:42:59,656 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:59,656 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:42:59,656 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827001056] [2019-10-14 23:42:59,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:42:59,657 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:59,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:42:59,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:59,658 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 4 states. [2019-10-14 23:42:59,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:59,737 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-10-14 23:42:59,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:42:59,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-10-14 23:42:59,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:59,739 INFO L225 Difference]: With dead ends: 45 [2019-10-14 23:42:59,739 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:42:59,739 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 23:42:59,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:42:59,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-10-14 23:42:59,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:42:59,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-14 23:42:59,746 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2019-10-14 23:42:59,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:59,748 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-14 23:42:59,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:42:59,748 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-14 23:42:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 23:42:59,749 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:59,749 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:59,750 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:59,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:59,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1550635457, now seen corresponding path program 1 times [2019-10-14 23:42:59,750 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:59,751 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844826695] [2019-10-14 23:42:59,751 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:59,751 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:59,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:42:59,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844826695] [2019-10-14 23:42:59,888 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078201658] [2019-10-14 23:42:59,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:42:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:59,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:42:59,975 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:59,976 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 23:42:59,976 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895280320] [2019-10-14 23:42:59,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:42:59,977 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:59,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:42:59,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:59,980 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2019-10-14 23:43:00,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:00,087 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2019-10-14 23:43:00,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:43:00,091 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2019-10-14 23:43:00,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:00,092 INFO L225 Difference]: With dead ends: 54 [2019-10-14 23:43:00,092 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:43:00,092 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 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 23:43:00,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:43:00,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-10-14 23:43:00,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:43:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-10-14 23:43:00,103 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 45 [2019-10-14 23:43:00,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:00,103 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-10-14 23:43:00,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:43:00,104 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-10-14 23:43:00,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 23:43:00,108 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:00,108 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:00,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:00,309 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:00,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:00,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1356401117, now seen corresponding path program 2 times [2019-10-14 23:43:00,311 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:00,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937602041] [2019-10-14 23:43:00,312 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,312 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:43:00,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937602041] [2019-10-14 23:43:00,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133734646] [2019-10-14 23:43:00,446 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 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 23:43:00,513 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:00,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:00,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:43:00,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:43:00,540 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:00,540 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 23:43:00,540 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294473488] [2019-10-14 23:43:00,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:43:00,541 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:00,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:43:00,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:43:00,544 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 7 states. [2019-10-14 23:43:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:00,644 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-10-14 23:43:00,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:43:00,644 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2019-10-14 23:43:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:00,645 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:43:00,646 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 23:43:00,646 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 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 23:43:00,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 23:43:00,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-14 23:43:00,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 23:43:00,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2019-10-14 23:43:00,653 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 47 [2019-10-14 23:43:00,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:00,654 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2019-10-14 23:43:00,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:43:00,654 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2019-10-14 23:43:00,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 23:43:00,655 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:00,655 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:00,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:00,859 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:00,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:00,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1005160965, now seen corresponding path program 3 times [2019-10-14 23:43:00,860 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:00,860 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486867289] [2019-10-14 23:43:00,860 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,861 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:43:00,996 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486867289] [2019-10-14 23:43:00,996 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419719178] [2019-10-14 23:43:00,996 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 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 23:43:01,059 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:43:01,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:01,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:43:01,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 23:43:01,097 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:01,097 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 23:43:01,097 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316496510] [2019-10-14 23:43:01,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:43:01,098 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:01,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:43:01,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:43:01,099 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 9 states. [2019-10-14 23:43:01,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:01,256 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2019-10-14 23:43:01,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:43:01,256 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2019-10-14 23:43:01,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:01,257 INFO L225 Difference]: With dead ends: 63 [2019-10-14 23:43:01,257 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:43:01,258 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:43:01,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:43:01,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2019-10-14 23:43:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:43:01,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-10-14 23:43:01,264 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 49 [2019-10-14 23:43:01,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:01,265 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-10-14 23:43:01,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:43:01,265 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-10-14 23:43:01,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 23:43:01,266 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:01,266 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:01,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:01,470 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:01,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:01,472 INFO L82 PathProgramCache]: Analyzing trace with hash 742022364, now seen corresponding path program 4 times [2019-10-14 23:43:01,472 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:01,472 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807186036] [2019-10-14 23:43:01,473 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:01,473 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:01,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 23:43:01,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807186036] [2019-10-14 23:43:01,614 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380721115] [2019-10-14 23:43:01,615 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 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 23:43:01,685 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:01,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:01,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:43:01,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 23:43:01,724 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:01,724 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 23:43:01,724 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115982437] [2019-10-14 23:43:01,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:43:01,726 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:01,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:43:01,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:43:01,730 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 9 states. [2019-10-14 23:43:01,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:01,835 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2019-10-14 23:43:01,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:43:01,836 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2019-10-14 23:43:01,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:01,837 INFO L225 Difference]: With dead ends: 66 [2019-10-14 23:43:01,837 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:43:01,838 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 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 23:43:01,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:43:01,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 23:43:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:43:01,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-10-14 23:43:01,849 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 60 [2019-10-14 23:43:01,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:01,852 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-10-14 23:43:01,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:43:01,852 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-10-14 23:43:01,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-14 23:43:01,853 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:01,853 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:02,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:02,060 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:02,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:02,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1389751938, now seen corresponding path program 5 times [2019-10-14 23:43:02,061 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:02,061 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133342409] [2019-10-14 23:43:02,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,062 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 23:43:02,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133342409] [2019-10-14 23:43:02,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141597962] [2019-10-14 23:43:02,169 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 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 23:43:02,257 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-14 23:43:02,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:02,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:43:02,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 5 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-14 23:43:02,321 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:02,322 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 23:43:02,322 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151809412] [2019-10-14 23:43:02,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:43:02,332 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:02,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:43:02,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:02,333 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 12 states. [2019-10-14 23:43:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:02,511 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2019-10-14 23:43:02,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:43:02,512 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2019-10-14 23:43:02,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:02,513 INFO L225 Difference]: With dead ends: 73 [2019-10-14 23:43:02,513 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 23:43:02,514 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:43:02,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 23:43:02,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2019-10-14 23:43:02,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 23:43:02,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2019-10-14 23:43:02,519 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 62 [2019-10-14 23:43:02,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:02,520 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2019-10-14 23:43:02,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:43:02,520 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2019-10-14 23:43:02,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-14 23:43:02,521 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:02,521 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:02,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:02,722 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:02,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:02,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1972208203, now seen corresponding path program 6 times [2019-10-14 23:43:02,723 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:02,724 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97258451] [2019-10-14 23:43:02,724 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,724 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-10-14 23:43:02,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97258451] [2019-10-14 23:43:02,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010810164] [2019-10-14 23:43:02,854 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 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 23:43:02,952 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 23:43:02,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:02,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:43:02,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-10-14 23:43:02,998 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:02,999 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2019-10-14 23:43:02,999 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032694169] [2019-10-14 23:43:03,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:43:03,001 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:03,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:43:03,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:03,002 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 12 states. [2019-10-14 23:43:03,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:03,146 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2019-10-14 23:43:03,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:43:03,147 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2019-10-14 23:43:03,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:03,148 INFO L225 Difference]: With dead ends: 79 [2019-10-14 23:43:03,148 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 23:43:03,149 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:03,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 23:43:03,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2019-10-14 23:43:03,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 23:43:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2019-10-14 23:43:03,159 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 73 [2019-10-14 23:43:03,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:03,160 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2019-10-14 23:43:03,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:43:03,160 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2019-10-14 23:43:03,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-14 23:43:03,161 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:03,164 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:03,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:03,370 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:03,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:03,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1857138133, now seen corresponding path program 7 times [2019-10-14 23:43:03,370 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:03,370 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711120743] [2019-10-14 23:43:03,371 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:03,371 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:03,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-10-14 23:43:03,543 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711120743] [2019-10-14 23:43:03,543 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740594820] [2019-10-14 23:43:03,543 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 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 23:43:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:43:03,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-10-14 23:43:03,660 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:03,660 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 23:43:03,660 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353244635] [2019-10-14 23:43:03,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:43:03,661 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:03,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:43:03,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:03,662 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 12 states. [2019-10-14 23:43:03,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:03,771 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2019-10-14 23:43:03,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:43:03,771 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2019-10-14 23:43:03,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:03,772 INFO L225 Difference]: With dead ends: 82 [2019-10-14 23:43:03,772 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 23:43:03,773 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 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 23:43:03,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 23:43:03,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-10-14 23:43:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 23:43:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2019-10-14 23:43:03,780 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 77 [2019-10-14 23:43:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:03,780 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2019-10-14 23:43:03,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:43:03,780 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2019-10-14 23:43:03,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-14 23:43:03,781 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:03,781 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:03,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:03,986 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:03,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:03,986 INFO L82 PathProgramCache]: Analyzing trace with hash 15831411, now seen corresponding path program 8 times [2019-10-14 23:43:03,986 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:03,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089569794] [2019-10-14 23:43:03,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:03,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:03,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-10-14 23:43:04,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089569794] [2019-10-14 23:43:04,119 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591028561] [2019-10-14 23:43:04,119 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 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 23:43:04,192 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:04,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:04,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:43:04,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-10-14 23:43:04,221 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:04,221 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 23:43:04,225 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440409787] [2019-10-14 23:43:04,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:43:04,227 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:04,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:43:04,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:43:04,227 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 13 states. [2019-10-14 23:43:04,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:04,351 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2019-10-14 23:43:04,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:43:04,351 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2019-10-14 23:43:04,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:04,352 INFO L225 Difference]: With dead ends: 84 [2019-10-14 23:43:04,353 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 23:43:04,353 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 86 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 23:43:04,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 23:43:04,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-10-14 23:43:04,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 23:43:04,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2019-10-14 23:43:04,359 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 79 [2019-10-14 23:43:04,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:04,359 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2019-10-14 23:43:04,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:43:04,360 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2019-10-14 23:43:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 23:43:04,361 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:04,361 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:04,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:04,569 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:04,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:04,569 INFO L82 PathProgramCache]: Analyzing trace with hash 46597521, now seen corresponding path program 9 times [2019-10-14 23:43:04,569 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:04,570 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998106491] [2019-10-14 23:43:04,570 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:04,570 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:04,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-10-14 23:43:04,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998106491] [2019-10-14 23:43:04,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277981325] [2019-10-14 23:43:04,726 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 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 23:43:04,830 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:43:04,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:04,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:43:04,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 74 proven. 12 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-10-14 23:43:04,906 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:04,907 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2019-10-14 23:43:04,907 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304631415] [2019-10-14 23:43:04,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:43:04,911 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:04,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:43:04,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:43:04,913 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 17 states. [2019-10-14 23:43:05,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:05,152 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2019-10-14 23:43:05,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:43:05,153 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2019-10-14 23:43:05,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:05,154 INFO L225 Difference]: With dead ends: 91 [2019-10-14 23:43:05,154 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 23:43:05,155 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:43:05,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 23:43:05,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2019-10-14 23:43:05,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-14 23:43:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2019-10-14 23:43:05,171 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 81 [2019-10-14 23:43:05,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:05,171 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2019-10-14 23:43:05,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:43:05,171 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2019-10-14 23:43:05,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-14 23:43:05,173 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:05,173 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:05,373 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:05,373 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:05,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:05,374 INFO L82 PathProgramCache]: Analyzing trace with hash -313307898, now seen corresponding path program 10 times [2019-10-14 23:43:05,374 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:05,374 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490865782] [2019-10-14 23:43:05,375 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:05,375 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:05,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-14 23:43:05,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490865782] [2019-10-14 23:43:05,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641737355] [2019-10-14 23:43:05,540 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 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 23:43:05,619 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:05,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:05,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 23:43:05,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-14 23:43:05,644 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:05,644 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 23:43:05,644 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366958945] [2019-10-14 23:43:05,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:43:05,645 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:05,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:43:05,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:43:05,646 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 15 states. [2019-10-14 23:43:05,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:05,783 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2019-10-14 23:43:05,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:43:05,783 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 92 [2019-10-14 23:43:05,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:05,784 INFO L225 Difference]: With dead ends: 94 [2019-10-14 23:43:05,784 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 23:43:05,786 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:43:05,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 23:43:05,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-10-14 23:43:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 23:43:05,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2019-10-14 23:43:05,791 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 92 [2019-10-14 23:43:05,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:05,792 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2019-10-14 23:43:05,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:43:05,792 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2019-10-14 23:43:05,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-14 23:43:05,793 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:05,793 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:05,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:05,994 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:05,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:05,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1157101992, now seen corresponding path program 11 times [2019-10-14 23:43:05,995 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:05,995 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577812121] [2019-10-14 23:43:05,996 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:05,996 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:05,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-14 23:43:06,171 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577812121] [2019-10-14 23:43:06,171 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024018992] [2019-10-14 23:43:06,171 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 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 23:43:06,353 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-10-14 23:43:06,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:06,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:43:06,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 116 proven. 22 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2019-10-14 23:43:06,444 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:06,444 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-10-14 23:43:06,444 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860715006] [2019-10-14 23:43:06,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:43:06,445 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:06,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:43:06,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:43:06,446 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 20 states. [2019-10-14 23:43:06,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:06,702 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2019-10-14 23:43:06,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:43:06,702 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2019-10-14 23:43:06,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:06,703 INFO L225 Difference]: With dead ends: 101 [2019-10-14 23:43:06,703 INFO L226 Difference]: Without dead ends: 69 [2019-10-14 23:43:06,704 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:43:06,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-14 23:43:06,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2019-10-14 23:43:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 23:43:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2019-10-14 23:43:06,709 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 94 [2019-10-14 23:43:06,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:06,710 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2019-10-14 23:43:06,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:43:06,710 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2019-10-14 23:43:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-14 23:43:06,711 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:06,711 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 12, 12, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:06,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:06,916 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:06,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:06,917 INFO L82 PathProgramCache]: Analyzing trace with hash -135209269, now seen corresponding path program 12 times [2019-10-14 23:43:06,917 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:06,917 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240766244] [2019-10-14 23:43:06,917 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:06,917 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:06,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2019-10-14 23:43:07,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240766244] [2019-10-14 23:43:07,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77810690] [2019-10-14 23:43:07,106 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 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 23:43:07,232 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 23:43:07,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:07,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:43:07,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 180 proven. 4 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2019-10-14 23:43:07,270 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:07,270 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5] total 19 [2019-10-14 23:43:07,270 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482798978] [2019-10-14 23:43:07,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:43:07,271 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:07,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:43:07,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:07,272 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 19 states. [2019-10-14 23:43:07,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:07,461 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2019-10-14 23:43:07,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:43:07,461 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 105 [2019-10-14 23:43:07,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:07,462 INFO L225 Difference]: With dead ends: 107 [2019-10-14 23:43:07,462 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 23:43:07,463 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 23:43:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-10-14 23:43:07,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-14 23:43:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2019-10-14 23:43:07,467 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 105 [2019-10-14 23:43:07,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:07,468 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2019-10-14 23:43:07,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:43:07,468 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2019-10-14 23:43:07,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-14 23:43:07,469 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:07,469 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:07,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:07,678 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:07,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:07,679 INFO L82 PathProgramCache]: Analyzing trace with hash -929187861, now seen corresponding path program 13 times [2019-10-14 23:43:07,679 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:07,680 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311935205] [2019-10-14 23:43:07,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:07,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:07,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 23:43:07,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311935205] [2019-10-14 23:43:07,915 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688183825] [2019-10-14 23:43:07,915 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 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 23:43:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:43:08,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 23:43:08,025 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:08,025 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 23:43:08,025 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395664321] [2019-10-14 23:43:08,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:43:08,026 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:08,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:43:08,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:43:08,027 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 18 states. [2019-10-14 23:43:08,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:08,188 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2019-10-14 23:43:08,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:43:08,188 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2019-10-14 23:43:08,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:08,189 INFO L225 Difference]: With dead ends: 110 [2019-10-14 23:43:08,189 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 23:43:08,190 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 116 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 23:43:08,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 23:43:08,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-10-14 23:43:08,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 23:43:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2019-10-14 23:43:08,195 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 109 [2019-10-14 23:43:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:08,195 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2019-10-14 23:43:08,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:43:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2019-10-14 23:43:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-14 23:43:08,197 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:08,197 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:08,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:08,400 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:08,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:08,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1783127159, now seen corresponding path program 14 times [2019-10-14 23:43:08,401 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:08,402 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49116192] [2019-10-14 23:43:08,402 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:08,402 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:08,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 23:43:08,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49116192] [2019-10-14 23:43:08,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902697111] [2019-10-14 23:43:08,603 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 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 23:43:08,689 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:08,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:08,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:43:08,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 23:43:08,714 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:08,714 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 23:43:08,714 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107094978] [2019-10-14 23:43:08,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:43:08,715 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:08,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:43:08,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:08,715 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 19 states. [2019-10-14 23:43:08,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:08,913 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2019-10-14 23:43:08,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:43:08,913 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 111 [2019-10-14 23:43:08,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:08,914 INFO L225 Difference]: With dead ends: 112 [2019-10-14 23:43:08,914 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 23:43:08,915 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 118 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 23:43:08,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 23:43:08,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-10-14 23:43:08,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-14 23:43:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2019-10-14 23:43:08,920 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 111 [2019-10-14 23:43:08,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:08,920 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2019-10-14 23:43:08,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:43:08,920 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2019-10-14 23:43:08,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-14 23:43:08,922 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:08,922 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:09,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:09,122 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:09,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:09,123 INFO L82 PathProgramCache]: Analyzing trace with hash -2080039001, now seen corresponding path program 15 times [2019-10-14 23:43:09,123 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:09,123 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252180138] [2019-10-14 23:43:09,123 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:09,123 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:09,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 23:43:09,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252180138] [2019-10-14 23:43:09,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533275038] [2019-10-14 23:43:09,354 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 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 23:43:09,463 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-14 23:43:09,463 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:09,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:43:09,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 180 proven. 9 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2019-10-14 23:43:09,536 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:09,536 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6] total 23 [2019-10-14 23:43:09,537 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145732791] [2019-10-14 23:43:09,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 23:43:09,538 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:09,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 23:43:09,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:43:09,539 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 23 states. [2019-10-14 23:43:09,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:09,780 INFO L93 Difference]: Finished difference Result 117 states and 136 transitions. [2019-10-14 23:43:09,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:43:09,781 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 113 [2019-10-14 23:43:09,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:09,782 INFO L225 Difference]: With dead ends: 117 [2019-10-14 23:43:09,782 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 23:43:09,782 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:43:09,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 23:43:09,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2019-10-14 23:43:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-14 23:43:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2019-10-14 23:43:09,787 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 113 [2019-10-14 23:43:09,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:09,788 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2019-10-14 23:43:09,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 23:43:09,788 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2019-10-14 23:43:09,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-14 23:43:09,789 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:09,789 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:09,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:09,990 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:09,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:09,990 INFO L82 PathProgramCache]: Analyzing trace with hash -901827641, now seen corresponding path program 16 times [2019-10-14 23:43:09,990 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:09,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350126779] [2019-10-14 23:43:09,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:09,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:09,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 23:43:10,260 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350126779] [2019-10-14 23:43:10,260 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281772594] [2019-10-14 23:43:10,260 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 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 23:43:10,384 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:10,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:10,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:43:10,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:10,434 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 23:43:10,434 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:10,434 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 23:43:10,435 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488188717] [2019-10-14 23:43:10,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:43:10,436 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:10,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:43:10,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:43:10,437 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 21 states. [2019-10-14 23:43:10,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:10,652 INFO L93 Difference]: Finished difference Result 120 states and 138 transitions. [2019-10-14 23:43:10,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:43:10,653 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 117 [2019-10-14 23:43:10,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:10,654 INFO L225 Difference]: With dead ends: 120 [2019-10-14 23:43:10,654 INFO L226 Difference]: Without dead ends: 81 [2019-10-14 23:43:10,655 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 124 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 23:43:10,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-14 23:43:10,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2019-10-14 23:43:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-14 23:43:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2019-10-14 23:43:10,660 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 117 [2019-10-14 23:43:10,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:10,661 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2019-10-14 23:43:10,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:43:10,661 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2019-10-14 23:43:10,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-14 23:43:10,662 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:10,662 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:10,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:10,866 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:10,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:10,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1032150683, now seen corresponding path program 17 times [2019-10-14 23:43:10,867 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:10,867 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677597600] [2019-10-14 23:43:10,867 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:10,867 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:10,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 23:43:11,145 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677597600] [2019-10-14 23:43:11,145 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445638093] [2019-10-14 23:43:11,145 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 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 23:43:12,156 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-14 23:43:12,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:12,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:43:12,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 174 proven. 35 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-10-14 23:43:12,244 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:12,245 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 27 [2019-10-14 23:43:12,245 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737333108] [2019-10-14 23:43:12,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:43:12,245 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:12,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:43:12,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:43:12,248 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 27 states. [2019-10-14 23:43:12,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:12,618 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2019-10-14 23:43:12,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:43:12,618 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 119 [2019-10-14 23:43:12,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:12,619 INFO L225 Difference]: With dead ends: 127 [2019-10-14 23:43:12,619 INFO L226 Difference]: Without dead ends: 88 [2019-10-14 23:43:12,620 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:43:12,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-14 23:43:12,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2019-10-14 23:43:12,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-14 23:43:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2019-10-14 23:43:12,624 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 119 [2019-10-14 23:43:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:12,625 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2019-10-14 23:43:12,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:43:12,625 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2019-10-14 23:43:12,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-14 23:43:12,626 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:12,626 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:12,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:12,827 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:12,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:12,827 INFO L82 PathProgramCache]: Analyzing trace with hash -576331982, now seen corresponding path program 18 times [2019-10-14 23:43:12,827 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:12,828 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660439901] [2019-10-14 23:43:12,828 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:12,828 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:12,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-10-14 23:43:13,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660439901] [2019-10-14 23:43:13,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873589481] [2019-10-14 23:43:13,139 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 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 23:43:13,313 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-14 23:43:13,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:13,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:43:13,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 250 proven. 16 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2019-10-14 23:43:13,405 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:13,405 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 27 [2019-10-14 23:43:13,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67493662] [2019-10-14 23:43:13,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:43:13,406 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:13,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:43:13,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:43:13,407 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 27 states. [2019-10-14 23:43:13,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:13,609 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2019-10-14 23:43:13,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:43:13,611 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 130 [2019-10-14 23:43:13,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:13,612 INFO L225 Difference]: With dead ends: 133 [2019-10-14 23:43:13,612 INFO L226 Difference]: Without dead ends: 91 [2019-10-14 23:43:13,613 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:43:13,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-14 23:43:13,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-10-14 23:43:13,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-14 23:43:13,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2019-10-14 23:43:13,619 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 130 [2019-10-14 23:43:13,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:13,620 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2019-10-14 23:43:13,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:43:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2019-10-14 23:43:13,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 23:43:13,621 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:13,621 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:13,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:13,827 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:13,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:13,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2079637010, now seen corresponding path program 19 times [2019-10-14 23:43:13,828 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:13,828 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779428830] [2019-10-14 23:43:13,828 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:13,828 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:13,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-14 23:43:14,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779428830] [2019-10-14 23:43:14,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041701539] [2019-10-14 23:43:14,213 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 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 23:43:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:43:14,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-14 23:43:14,394 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:14,395 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 23:43:14,395 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015109340] [2019-10-14 23:43:14,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:43:14,396 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:14,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:43:14,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:43:14,398 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 24 states. [2019-10-14 23:43:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:14,603 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2019-10-14 23:43:14,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:43:14,604 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 134 [2019-10-14 23:43:14,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:14,605 INFO L225 Difference]: With dead ends: 135 [2019-10-14 23:43:14,605 INFO L226 Difference]: Without dead ends: 91 [2019-10-14 23:43:14,605 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:43:14,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-14 23:43:14,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-10-14 23:43:14,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 23:43:14,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2019-10-14 23:43:14,611 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 134 [2019-10-14 23:43:14,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:14,611 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2019-10-14 23:43:14,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:43:14,611 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2019-10-14 23:43:14,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-14 23:43:14,612 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:14,612 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:14,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:14,813 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:14,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:14,814 INFO L82 PathProgramCache]: Analyzing trace with hash 275415092, now seen corresponding path program 20 times [2019-10-14 23:43:14,814 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:14,814 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690234632] [2019-10-14 23:43:14,815 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:14,815 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:14,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2019-10-14 23:43:15,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690234632] [2019-10-14 23:43:15,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024738027] [2019-10-14 23:43:15,003 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 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 23:43:15,121 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:15,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:15,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:43:15,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2019-10-14 23:43:15,143 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:15,143 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2019-10-14 23:43:15,143 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430105288] [2019-10-14 23:43:15,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:43:15,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:15,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:43:15,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:43:15,145 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand 10 states. [2019-10-14 23:43:15,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:15,305 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2019-10-14 23:43:15,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:43:15,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 136 [2019-10-14 23:43:15,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:15,307 INFO L225 Difference]: With dead ends: 139 [2019-10-14 23:43:15,307 INFO L226 Difference]: Without dead ends: 96 [2019-10-14 23:43:15,307 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:43:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-14 23:43:15,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2019-10-14 23:43:15,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-14 23:43:15,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2019-10-14 23:43:15,314 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 136 [2019-10-14 23:43:15,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:15,314 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2019-10-14 23:43:15,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:43:15,315 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2019-10-14 23:43:15,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-14 23:43:15,315 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:15,316 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:15,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:15,520 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:15,520 INFO L82 PathProgramCache]: Analyzing trace with hash -167172191, now seen corresponding path program 21 times [2019-10-14 23:43:15,520 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:15,521 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425874793] [2019-10-14 23:43:15,521 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:15,521 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:15,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 330 proven. 70 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2019-10-14 23:43:15,698 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425874793] [2019-10-14 23:43:15,698 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774603314] [2019-10-14 23:43:15,698 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 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 23:43:15,828 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-14 23:43:15,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:15,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:43:15,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 332 proven. 25 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2019-10-14 23:43:15,941 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:15,941 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2019-10-14 23:43:15,941 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896062803] [2019-10-14 23:43:15,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:43:15,942 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:15,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:43:15,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:43:15,942 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand 17 states. [2019-10-14 23:43:16,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:16,206 INFO L93 Difference]: Finished difference Result 148 states and 175 transitions. [2019-10-14 23:43:16,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:43:16,206 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 145 [2019-10-14 23:43:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:16,207 INFO L225 Difference]: With dead ends: 148 [2019-10-14 23:43:16,207 INFO L226 Difference]: Without dead ends: 102 [2019-10-14 23:43:16,208 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:43:16,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-10-14 23:43:16,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2019-10-14 23:43:16,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-14 23:43:16,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2019-10-14 23:43:16,212 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 145 [2019-10-14 23:43:16,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:16,212 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2019-10-14 23:43:16,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:43:16,212 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2019-10-14 23:43:16,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-14 23:43:16,213 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:16,214 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 24, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:16,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:16,418 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:16,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:16,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1348963054, now seen corresponding path program 22 times [2019-10-14 23:43:16,419 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:16,419 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527585093] [2019-10-14 23:43:16,420 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:16,420 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:16,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 0 proven. 516 refuted. 0 times theorem prover too weak. 835 trivial. 0 not checked. [2019-10-14 23:43:16,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527585093] [2019-10-14 23:43:16,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302893988] [2019-10-14 23:43:16,600 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 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 23:43:16,732 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:16,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:16,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:43:16,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 424 proven. 92 refuted. 0 times theorem prover too weak. 835 trivial. 0 not checked. [2019-10-14 23:43:16,763 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:16,763 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2019-10-14 23:43:16,763 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584456280] [2019-10-14 23:43:16,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:43:16,764 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:16,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:43:16,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:16,765 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 12 states. [2019-10-14 23:43:16,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:16,990 INFO L93 Difference]: Finished difference Result 155 states and 183 transitions. [2019-10-14 23:43:16,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:43:16,990 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 156 [2019-10-14 23:43:16,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:16,991 INFO L225 Difference]: With dead ends: 155 [2019-10-14 23:43:16,991 INFO L226 Difference]: Without dead ends: 104 [2019-10-14 23:43:16,992 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:43:16,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-14 23:43:16,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2019-10-14 23:43:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-10-14 23:43:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2019-10-14 23:43:16,998 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 156 [2019-10-14 23:43:16,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:16,998 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2019-10-14 23:43:16,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:43:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2019-10-14 23:43:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-14 23:43:16,999 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:17,000 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 27, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:17,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:17,204 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:17,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:17,204 INFO L82 PathProgramCache]: Analyzing trace with hash 2105687683, now seen corresponding path program 23 times [2019-10-14 23:43:17,204 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:17,205 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36640401] [2019-10-14 23:43:17,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:17,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:17,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1585 backedges. 0 proven. 647 refuted. 0 times theorem prover too weak. 938 trivial. 0 not checked. [2019-10-14 23:43:17,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36640401] [2019-10-14 23:43:17,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606372598] [2019-10-14 23:43:17,405 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 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 23:43:19,036 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-10-14 23:43:19,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:19,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:43:19,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1585 backedges. 526 proven. 117 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2019-10-14 23:43:19,066 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:19,066 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2019-10-14 23:43:19,066 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758198494] [2019-10-14 23:43:19,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:43:19,067 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:19,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:43:19,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:43:19,067 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand 13 states. [2019-10-14 23:43:19,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:19,382 INFO L93 Difference]: Finished difference Result 161 states and 191 transitions. [2019-10-14 23:43:19,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:43:19,383 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 165 [2019-10-14 23:43:19,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:19,384 INFO L225 Difference]: With dead ends: 161 [2019-10-14 23:43:19,384 INFO L226 Difference]: Without dead ends: 107 [2019-10-14 23:43:19,385 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:43:19,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-14 23:43:19,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-10-14 23:43:19,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-14 23:43:19,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2019-10-14 23:43:19,392 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 165 [2019-10-14 23:43:19,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:19,392 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2019-10-14 23:43:19,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:43:19,393 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2019-10-14 23:43:19,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-14 23:43:19,394 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:19,395 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 30, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:19,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:19,603 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:19,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:19,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1111875122, now seen corresponding path program 24 times [2019-10-14 23:43:19,604 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:19,604 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842834580] [2019-10-14 23:43:19,605 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:19,605 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:19,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1846 backedges. 0 proven. 793 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2019-10-14 23:43:19,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842834580] [2019-10-14 23:43:19,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811584501] [2019-10-14 23:43:19,901 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 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 23:43:21,052 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-10-14 23:43:21,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:21,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:43:21,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1846 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 1160 trivial. 0 not checked. [2019-10-14 23:43:21,179 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:21,179 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2019-10-14 23:43:21,179 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315185873] [2019-10-14 23:43:21,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:43:21,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:21,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:43:21,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:43:21,180 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand 21 states. [2019-10-14 23:43:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:21,581 INFO L93 Difference]: Finished difference Result 170 states and 203 transitions. [2019-10-14 23:43:21,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 23:43:21,581 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 174 [2019-10-14 23:43:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:21,582 INFO L225 Difference]: With dead ends: 170 [2019-10-14 23:43:21,582 INFO L226 Difference]: Without dead ends: 113 [2019-10-14 23:43:21,583 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:43:21,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-10-14 23:43:21,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2019-10-14 23:43:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-14 23:43:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2019-10-14 23:43:21,592 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 174 [2019-10-14 23:43:21,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:21,592 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2019-10-14 23:43:21,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:43:21,593 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2019-10-14 23:43:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-14 23:43:21,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:21,594 INFO L380 BasicCegarLoop]: trace histogram [33, 33, 33, 20, 20, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:21,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:21,799 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:21,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:21,800 INFO L82 PathProgramCache]: Analyzing trace with hash -939216411, now seen corresponding path program 25 times [2019-10-14 23:43:21,800 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:21,801 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907731439] [2019-10-14 23:43:21,801 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:21,801 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:21,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 1193 trivial. 0 not checked. [2019-10-14 23:43:22,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907731439] [2019-10-14 23:43:22,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117986196] [2019-10-14 23:43:22,043 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 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 23:43:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:43:22,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 774 proven. 176 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2019-10-14 23:43:22,253 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:22,253 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2019-10-14 23:43:22,253 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726375334] [2019-10-14 23:43:22,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:43:22,254 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:22,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:43:22,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:43:22,255 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand 15 states. [2019-10-14 23:43:22,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:22,598 INFO L93 Difference]: Finished difference Result 177 states and 211 transitions. [2019-10-14 23:43:22,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:43:22,598 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 185 [2019-10-14 23:43:22,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:22,599 INFO L225 Difference]: With dead ends: 177 [2019-10-14 23:43:22,600 INFO L226 Difference]: Without dead ends: 115 [2019-10-14 23:43:22,602 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:43:22,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-14 23:43:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-10-14 23:43:22,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-10-14 23:43:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2019-10-14 23:43:22,607 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 185 [2019-10-14 23:43:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:22,608 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2019-10-14 23:43:22,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:43:22,608 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2019-10-14 23:43:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-10-14 23:43:22,609 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:22,610 INFO L380 BasicCegarLoop]: trace histogram [36, 36, 36, 20, 20, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:22,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:22,811 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:22,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1093785616, now seen corresponding path program 26 times [2019-10-14 23:43:22,812 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:22,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293721157] [2019-10-14 23:43:22,812 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:22,812 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:22,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2462 backedges. 0 proven. 1130 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2019-10-14 23:43:23,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293721157] [2019-10-14 23:43:23,059 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021064348] [2019-10-14 23:43:23,059 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 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 23:43:23,191 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:23,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:23,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 23:43:23,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2462 backedges. 916 proven. 210 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2019-10-14 23:43:23,218 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:23,218 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2019-10-14 23:43:23,218 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406103836] [2019-10-14 23:43:23,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:43:23,219 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:23,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:43:23,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:43:23,220 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand 16 states. [2019-10-14 23:43:23,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:23,580 INFO L93 Difference]: Finished difference Result 183 states and 219 transitions. [2019-10-14 23:43:23,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:43:23,580 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 194 [2019-10-14 23:43:23,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:23,581 INFO L225 Difference]: With dead ends: 183 [2019-10-14 23:43:23,581 INFO L226 Difference]: Without dead ends: 118 [2019-10-14 23:43:23,582 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:43:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-14 23:43:23,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2019-10-14 23:43:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-10-14 23:43:23,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 133 transitions. [2019-10-14 23:43:23,588 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 133 transitions. Word has length 194 [2019-10-14 23:43:23,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:23,588 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 133 transitions. [2019-10-14 23:43:23,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:43:23,588 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 133 transitions. [2019-10-14 23:43:23,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-14 23:43:23,590 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:23,590 INFO L380 BasicCegarLoop]: trace histogram [39, 39, 39, 20, 20, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:23,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:23,794 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:23,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:23,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1122009019, now seen corresponding path program 27 times [2019-10-14 23:43:23,795 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:23,796 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436604966] [2019-10-14 23:43:23,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:23,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:23,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2804 backedges. 0 proven. 1321 refuted. 0 times theorem prover too weak. 1483 trivial. 0 not checked. [2019-10-14 23:43:24,090 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436604966] [2019-10-14 23:43:24,090 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144275510] [2019-10-14 23:43:24,090 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:24,324 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-14 23:43:24,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:24,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:43:24,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2804 backedges. 1076 proven. 49 refuted. 0 times theorem prover too weak. 1679 trivial. 0 not checked. [2019-10-14 23:43:24,460 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:24,460 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 25 [2019-10-14 23:43:24,461 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159201115] [2019-10-14 23:43:24,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 23:43:24,461 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:24,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 23:43:24,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:43:24,462 INFO L87 Difference]: Start difference. First operand 116 states and 133 transitions. Second operand 25 states. [2019-10-14 23:43:25,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:25,017 INFO L93 Difference]: Finished difference Result 192 states and 231 transitions. [2019-10-14 23:43:25,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 23:43:25,017 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 203 [2019-10-14 23:43:25,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:25,019 INFO L225 Difference]: With dead ends: 192 [2019-10-14 23:43:25,019 INFO L226 Difference]: Without dead ends: 124 [2019-10-14 23:43:25,021 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=404, Invalid=1078, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 23:43:25,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-10-14 23:43:25,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2019-10-14 23:43:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-14 23:43:25,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 139 transitions. [2019-10-14 23:43:25,030 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 139 transitions. Word has length 203 [2019-10-14 23:43:25,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:25,030 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 139 transitions. [2019-10-14 23:43:25,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 23:43:25,030 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 139 transitions. [2019-10-14 23:43:25,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-14 23:43:25,032 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:25,032 INFO L380 BasicCegarLoop]: trace histogram [42, 42, 42, 20, 20, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:25,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:25,238 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:25,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:25,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1410049390, now seen corresponding path program 28 times [2019-10-14 23:43:25,238 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:25,239 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468096570] [2019-10-14 23:43:25,239 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:25,239 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:25,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3188 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 1661 trivial. 0 not checked. [2019-10-14 23:43:25,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468096570] [2019-10-14 23:43:25,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392413215] [2019-10-14 23:43:25,540 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:25,697 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:25,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:25,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:43:25,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3188 backedges. 1236 proven. 287 refuted. 0 times theorem prover too weak. 1665 trivial. 0 not checked. [2019-10-14 23:43:25,741 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:25,741 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2019-10-14 23:43:25,742 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660209285] [2019-10-14 23:43:25,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:43:25,742 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:25,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:43:25,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:43:25,743 INFO L87 Difference]: Start difference. First operand 121 states and 139 transitions. Second operand 18 states. [2019-10-14 23:43:26,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:26,172 INFO L93 Difference]: Finished difference Result 199 states and 239 transitions. [2019-10-14 23:43:26,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:43:26,173 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 214 [2019-10-14 23:43:26,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:26,174 INFO L225 Difference]: With dead ends: 199 [2019-10-14 23:43:26,174 INFO L226 Difference]: Without dead ends: 126 [2019-10-14 23:43:26,175 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:43:26,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-14 23:43:26,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2019-10-14 23:43:26,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-10-14 23:43:26,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2019-10-14 23:43:26,181 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 214 [2019-10-14 23:43:26,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:26,181 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2019-10-14 23:43:26,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:43:26,182 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2019-10-14 23:43:26,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-10-14 23:43:26,183 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:26,183 INFO L380 BasicCegarLoop]: trace histogram [45, 45, 45, 20, 20, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:26,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:26,388 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:26,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:26,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1022979751, now seen corresponding path program 29 times [2019-10-14 23:43:26,388 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:26,389 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633827748] [2019-10-14 23:43:26,389 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:26,389 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:26,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3584 backedges. 1418 proven. 330 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2019-10-14 23:43:26,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633827748] [2019-10-14 23:43:26,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662066857] [2019-10-14 23:43:26,871 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:34,034 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-10-14 23:43:34,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:34,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:43:34,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3584 backedges. 1414 proven. 330 refuted. 0 times theorem prover too weak. 1840 trivial. 0 not checked. [2019-10-14 23:43:34,081 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:34,081 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2019-10-14 23:43:34,081 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689277872] [2019-10-14 23:43:34,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:43:34,082 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:34,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:43:34,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:34,083 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand 19 states. [2019-10-14 23:43:34,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:34,550 INFO L93 Difference]: Finished difference Result 205 states and 247 transitions. [2019-10-14 23:43:34,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:43:34,551 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 223 [2019-10-14 23:43:34,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:34,552 INFO L225 Difference]: With dead ends: 205 [2019-10-14 23:43:34,552 INFO L226 Difference]: Without dead ends: 129 [2019-10-14 23:43:34,553 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:43:34,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-10-14 23:43:34,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2019-10-14 23:43:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-10-14 23:43:34,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 147 transitions. [2019-10-14 23:43:34,560 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 147 transitions. Word has length 223 [2019-10-14 23:43:34,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:34,560 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 147 transitions. [2019-10-14 23:43:34,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:43:34,561 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 147 transitions. [2019-10-14 23:43:34,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-10-14 23:43:34,562 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:34,562 INFO L380 BasicCegarLoop]: trace histogram [48, 48, 48, 20, 20, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:34,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:34,773 INFO L410 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:34,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:34,773 INFO L82 PathProgramCache]: Analyzing trace with hash 387729806, now seen corresponding path program 30 times [2019-10-14 23:43:34,773 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:34,773 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081607] [2019-10-14 23:43:34,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:34,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:34,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4007 backedges. 1608 proven. 376 refuted. 0 times theorem prover too weak. 2023 trivial. 0 not checked. [2019-10-14 23:43:35,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081607] [2019-10-14 23:43:35,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757807350] [2019-10-14 23:43:35,291 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:35,797 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-14 23:43:35,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:35,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:43:35,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4007 backedges. 1610 proven. 64 refuted. 0 times theorem prover too weak. 2333 trivial. 0 not checked. [2019-10-14 23:43:35,966 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:35,966 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2019-10-14 23:43:35,966 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612576424] [2019-10-14 23:43:35,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-14 23:43:35,967 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:35,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-14 23:43:35,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:43:35,967 INFO L87 Difference]: Start difference. First operand 127 states and 147 transitions. Second operand 29 states.