java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/bAnd3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:41:12,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:41:12,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:41:12,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:41:12,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:41:12,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:41:12,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:41:12,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:41:12,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:41:12,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:41:12,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:41:12,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:41:12,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:41:12,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:41:12,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:41:12,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:41:12,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:41:12,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:41:12,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:41:12,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:41:12,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:41:12,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:41:12,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:41:12,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:41:12,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 17:41:12,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 17:41:12,902 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 17:41:12,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 17:41:12,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 17:41:12,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 17:41:12,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:41:12,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:41:12,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:41:12,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:41:12,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:41:12,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:41:12,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:41:12,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:41:12,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:41:12,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:41:12,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:41:12,919 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 [2019-10-13 17:41:12,954 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:41:12,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:41:12,958 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:41:12,958 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:41:12,958 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:41:12,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:41:12,959 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:41:12,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:41:12,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:41:12,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:41:12,959 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:41:12,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:41:12,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:41:12,960 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:41:12,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:41:12,961 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:41:12,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:41:12,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:41:12,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:41:12,962 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:41:12,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:41:12,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:41:12,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:41:12,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:41:12,963 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:41:12,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:41:12,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:41:12,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:41:12,964 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:41:13,250 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:41:13,263 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:41:13,267 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:41:13,269 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:41:13,269 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:41:13,270 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bAnd3.i [2019-10-13 17:41:13,351 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47e8bbca3/4d6f9d379eed4e0fa503d434c4997e65/FLAGc5a16e0b6 [2019-10-13 17:41:13,789 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:41:13,790 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd3.i [2019-10-13 17:41:13,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47e8bbca3/4d6f9d379eed4e0fa503d434c4997e65/FLAGc5a16e0b6 [2019-10-13 17:41:14,224 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47e8bbca3/4d6f9d379eed4e0fa503d434c4997e65 [2019-10-13 17:41:14,233 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:41:14,235 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:41:14,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:41:14,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:41:14,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:41:14,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66da9fbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14, skipping insertion in model container [2019-10-13 17:41:14,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,253 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:41:14,272 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:41:14,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:41:14,497 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:41:14,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:41:14,617 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:41:14,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14 WrapperNode [2019-10-13 17:41:14,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:41:14,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:41:14,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:41:14,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:41:14,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:41:14,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:41:14,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:41:14,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:41:14,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (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 [2019-10-13 17:41:14,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:41:14,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:41:14,745 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2019-10-13 17:41:14,745 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:41:14,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:41:14,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:41:14,745 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2019-10-13 17:41:14,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:41:14,746 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:41:14,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:41:14,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:41:14,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:41:14,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:41:14,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:41:14,998 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:41:14,999 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 17:41:15,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:41:15 BoogieIcfgContainer [2019-10-13 17:41:15,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:41:15,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:41:15,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:41:15,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:41:15,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:41:14" (1/3) ... [2019-10-13 17:41:15,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f28b7aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:41:15, skipping insertion in model container [2019-10-13 17:41:15,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (2/3) ... [2019-10-13 17:41:15,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f28b7aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:41:15, skipping insertion in model container [2019-10-13 17:41:15,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:41:15" (3/3) ... [2019-10-13 17:41:15,011 INFO L109 eAbstractionObserver]: Analyzing ICFG bAnd3.i [2019-10-13 17:41:15,023 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:41:15,032 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:41:15,053 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:41:15,099 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:41:15,099 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:41:15,100 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:41:15,100 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:41:15,100 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:41:15,100 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:41:15,101 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:41:15,101 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:41:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-13 17:41:15,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:41:15,132 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:15,133 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] [2019-10-13 17:41:15,137 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:15,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:15,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1283808693, now seen corresponding path program 1 times [2019-10-13 17:41:15,152 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:15,153 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513835759] [2019-10-13 17:41:15,153 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,153 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:41:15,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513835759] [2019-10-13 17:41:15,402 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:41:15,403 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:41:15,403 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543227035] [2019-10-13 17:41:15,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:41:15,408 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:15,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:41:15,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:41:15,429 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-13 17:41:15,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:15,558 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-10-13 17:41:15,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:41:15,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-13 17:41:15,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:15,571 INFO L225 Difference]: With dead ends: 54 [2019-10-13 17:41:15,571 INFO L226 Difference]: Without dead ends: 26 [2019-10-13 17:41:15,575 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:41:15,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-13 17:41:15,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-13 17:41:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 17:41:15,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-13 17:41:15,615 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-10-13 17:41:15,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:15,616 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-13 17:41:15,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:41:15,617 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-13 17:41:15,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:41:15,619 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:15,619 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] [2019-10-13 17:41:15,620 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:15,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:15,620 INFO L82 PathProgramCache]: Analyzing trace with hash 721846027, now seen corresponding path program 1 times [2019-10-13 17:41:15,621 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:15,621 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985927122] [2019-10-13 17:41:15,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,622 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:41:15,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985927122] [2019-10-13 17:41:15,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125996678] [2019-10-13 17:41:15,778 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 [2019-10-13 17:41:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 17:41:15,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:15,913 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:41:15,913 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:41:15,914 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 17:41:15,914 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974887222] [2019-10-13 17:41:15,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:41:15,916 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:15,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:41:15,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:41:15,917 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-10-13 17:41:15,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:15,937 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-10-13 17:41:15,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:41:15,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-13 17:41:15,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:15,940 INFO L225 Difference]: With dead ends: 46 [2019-10-13 17:41:15,940 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 17:41:15,943 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 [2019-10-13 17:41:15,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 17:41:15,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-13 17:41:15,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 17:41:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-13 17:41:15,957 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-10-13 17:41:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:15,957 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-13 17:41:15,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:41:15,958 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-13 17:41:15,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 17:41:15,961 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:15,961 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] [2019-10-13 17:41:16,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:16,165 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:16,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:16,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1487444845, now seen corresponding path program 1 times [2019-10-13 17:41:16,166 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:16,167 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362375087] [2019-10-13 17:41:16,167 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:16,169 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:16,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 17:41:16,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362375087] [2019-10-13 17:41:16,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539153705] [2019-10-13 17:41:16,292 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 [2019-10-13 17:41:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 17:41:16,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:41:16,377 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:41:16,378 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-13 17:41:16,378 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495009816] [2019-10-13 17:41:16,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:41:16,379 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:16,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:41:16,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:41:16,379 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-10-13 17:41:16,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:16,393 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-10-13 17:41:16,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:41:16,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-13 17:41:16,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:16,395 INFO L225 Difference]: With dead ends: 46 [2019-10-13 17:41:16,395 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 17:41:16,396 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 [2019-10-13 17:41:16,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 17:41:16,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-13 17:41:16,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 17:41:16,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-13 17:41:16,402 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-10-13 17:41:16,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:16,403 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-13 17:41:16,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:41:16,404 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-13 17:41:16,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 17:41:16,406 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:16,406 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:41:16,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:16,607 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:16,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:16,608 INFO L82 PathProgramCache]: Analyzing trace with hash 2063023467, now seen corresponding path program 1 times [2019-10-13 17:41:16,608 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:16,608 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246884353] [2019-10-13 17:41:16,609 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:16,609 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:16,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,714 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:41:16,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246884353] [2019-10-13 17:41:16,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365476314] [2019-10-13 17:41:16,714 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 [2019-10-13 17:41:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 17:41:16,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 17:41:16,795 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:41:16,795 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 17:41:16,795 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547125347] [2019-10-13 17:41:16,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:41:16,796 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:16,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:41:16,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:41:16,797 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-10-13 17:41:16,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:16,809 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-10-13 17:41:16,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:41:16,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-10-13 17:41:16,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:16,811 INFO L225 Difference]: With dead ends: 43 [2019-10-13 17:41:16,812 INFO L226 Difference]: Without dead ends: 30 [2019-10-13 17:41:16,812 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:41:16,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-13 17:41:16,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-13 17:41:16,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 17:41:16,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-13 17:41:16,819 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-10-13 17:41:16,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:16,823 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-13 17:41:16,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:41:16,823 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-13 17:41:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 17:41:16,827 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:16,827 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:41:17,030 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:17,031 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:17,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:17,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1550668567, now seen corresponding path program 1 times [2019-10-13 17:41:17,032 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:17,033 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001874926] [2019-10-13 17:41:17,033 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:17,033 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:17,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:41:17,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001874926] [2019-10-13 17:41:17,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486598916] [2019-10-13 17:41:17,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:17,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:41:17,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 17:41:17,229 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:17,230 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-10-13 17:41:17,230 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029815418] [2019-10-13 17:41:17,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:41:17,234 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:17,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:41:17,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:41:17,237 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-10-13 17:41:17,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:17,370 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-10-13 17:41:17,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:41:17,370 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-10-13 17:41:17,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:17,371 INFO L225 Difference]: With dead ends: 55 [2019-10-13 17:41:17,371 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 17:41:17,372 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:41:17,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 17:41:17,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-13 17:41:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 17:41:17,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-13 17:41:17,378 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-10-13 17:41:17,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:17,379 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-13 17:41:17,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:41:17,379 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-13 17:41:17,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-13 17:41:17,380 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:17,380 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 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] [2019-10-13 17:41:17,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:17,582 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:17,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:17,583 INFO L82 PathProgramCache]: Analyzing trace with hash 948091209, now seen corresponding path program 2 times [2019-10-13 17:41:17,583 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:17,584 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864684952] [2019-10-13 17:41:17,584 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:17,584 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:17,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 17:41:17,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864684952] [2019-10-13 17:41:17,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695795292] [2019-10-13 17:41:17,678 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:17,737 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:17,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:17,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:41:17,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 17:41:17,761 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:17,761 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 17:41:17,761 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864181379] [2019-10-13 17:41:17,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:41:17,762 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:17,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:41:17,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:41:17,763 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-10-13 17:41:17,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:17,873 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-10-13 17:41:17,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:41:17,873 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-10-13 17:41:17,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:17,874 INFO L225 Difference]: With dead ends: 58 [2019-10-13 17:41:17,874 INFO L226 Difference]: Without dead ends: 36 [2019-10-13 17:41:17,877 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:41:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-13 17:41:17,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-13 17:41:17,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-13 17:41:17,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-10-13 17:41:17,890 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-10-13 17:41:17,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:17,890 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-10-13 17:41:17,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:41:17,890 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-10-13 17:41:17,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 17:41:17,896 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:17,897 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 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] [2019-10-13 17:41:18,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:18,110 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:18,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:18,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1603223851, now seen corresponding path program 3 times [2019-10-13 17:41:18,111 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:18,111 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489521291] [2019-10-13 17:41:18,111 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:18,111 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:18,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 17:41:18,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489521291] [2019-10-13 17:41:18,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181672457] [2019-10-13 17:41:18,217 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:18,284 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:41:18,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:18,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:41:18,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 17:41:18,315 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:18,316 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-13 17:41:18,316 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50211226] [2019-10-13 17:41:18,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:41:18,317 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:18,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:41:18,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:41:18,317 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-10-13 17:41:18,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:18,458 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-10-13 17:41:18,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:41:18,458 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-10-13 17:41:18,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:18,459 INFO L225 Difference]: With dead ends: 63 [2019-10-13 17:41:18,459 INFO L226 Difference]: Without dead ends: 41 [2019-10-13 17:41:18,460 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:41:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-13 17:41:18,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-10-13 17:41:18,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-13 17:41:18,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-13 17:41:18,473 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-10-13 17:41:18,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:18,477 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-13 17:41:18,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:41:18,477 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-13 17:41:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 17:41:18,478 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:18,478 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 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] [2019-10-13 17:41:18,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:18,679 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:18,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:18,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1402505333, now seen corresponding path program 4 times [2019-10-13 17:41:18,680 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:18,680 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284126104] [2019-10-13 17:41:18,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:18,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:18,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 17:41:18,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284126104] [2019-10-13 17:41:18,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081160169] [2019-10-13 17:41:18,774 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:18,827 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:18,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:18,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:41:18,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 17:41:18,866 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:18,866 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 17:41:18,867 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46584673] [2019-10-13 17:41:18,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:41:18,867 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:18,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:41:18,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:41:18,868 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-10-13 17:41:18,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:18,949 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-10-13 17:41:18,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:41:18,949 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-10-13 17:41:18,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:18,950 INFO L225 Difference]: With dead ends: 66 [2019-10-13 17:41:18,950 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 17:41:18,951 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:41:18,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 17:41:18,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-13 17:41:18,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 17:41:18,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-13 17:41:18,962 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-10-13 17:41:18,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:18,962 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-13 17:41:18,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:41:18,963 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-13 17:41:18,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 17:41:18,965 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:18,965 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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] [2019-10-13 17:41:19,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:19,166 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:19,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:19,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1995640301, now seen corresponding path program 5 times [2019-10-13 17:41:19,167 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:19,168 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765646472] [2019-10-13 17:41:19,168 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:19,168 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:19,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 17:41:19,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765646472] [2019-10-13 17:41:19,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993310729] [2019-10-13 17:41:19,277 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:19,355 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-13 17:41:19,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:19,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:41:19,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-13 17:41:19,415 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:19,415 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 17:41:19,415 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147293355] [2019-10-13 17:41:19,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:41:19,416 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:19,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:41:19,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:41:19,416 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-10-13 17:41:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:19,567 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-10-13 17:41:19,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:41:19,568 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-10-13 17:41:19,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:19,569 INFO L225 Difference]: With dead ends: 71 [2019-10-13 17:41:19,569 INFO L226 Difference]: Without dead ends: 47 [2019-10-13 17:41:19,570 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:41:19,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-13 17:41:19,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-10-13 17:41:19,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-13 17:41:19,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-13 17:41:19,576 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-10-13 17:41:19,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:19,576 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-13 17:41:19,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:41:19,577 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-13 17:41:19,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-13 17:41:19,578 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:19,578 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 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] [2019-10-13 17:41:19,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:19,787 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:19,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:19,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1611767219, now seen corresponding path program 6 times [2019-10-13 17:41:19,788 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:19,788 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841158841] [2019-10-13 17:41:19,789 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:19,789 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:19,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-13 17:41:19,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841158841] [2019-10-13 17:41:19,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801039611] [2019-10-13 17:41:19,891 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:19,956 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 17:41:19,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:19,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:41:19,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-10-13 17:41:20,008 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:20,009 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-13 17:41:20,010 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565395093] [2019-10-13 17:41:20,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:41:20,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:20,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:41:20,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:41:20,012 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-10-13 17:41:20,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:20,198 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-10-13 17:41:20,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:41:20,199 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-13 17:41:20,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:20,200 INFO L225 Difference]: With dead ends: 77 [2019-10-13 17:41:20,200 INFO L226 Difference]: Without dead ends: 51 [2019-10-13 17:41:20,201 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:41:20,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-13 17:41:20,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-10-13 17:41:20,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 17:41:20,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-10-13 17:41:20,209 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-10-13 17:41:20,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:20,209 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-10-13 17:41:20,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:41:20,210 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-10-13 17:41:20,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-13 17:41:20,211 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:20,211 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 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] [2019-10-13 17:41:20,414 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:20,414 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:20,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:20,415 INFO L82 PathProgramCache]: Analyzing trace with hash -133387091, now seen corresponding path program 7 times [2019-10-13 17:41:20,416 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:20,416 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744033061] [2019-10-13 17:41:20,416 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:20,416 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:20,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:20,536 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744033061] [2019-10-13 17:41:20,536 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332924601] [2019-10-13 17:41:20,536 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:41:20,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:20,635 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:20,635 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 17:41:20,635 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230180120] [2019-10-13 17:41:20,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:41:20,636 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:20,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:41:20,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:41:20,637 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-10-13 17:41:20,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:20,723 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-10-13 17:41:20,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:41:20,723 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-10-13 17:41:20,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:20,724 INFO L225 Difference]: With dead ends: 80 [2019-10-13 17:41:20,725 INFO L226 Difference]: Without dead ends: 52 [2019-10-13 17:41:20,725 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:41:20,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-13 17:41:20,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-13 17:41:20,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-13 17:41:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-10-13 17:41:20,731 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-10-13 17:41:20,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:20,731 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-10-13 17:41:20,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:41:20,731 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-10-13 17:41:20,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-13 17:41:20,732 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:20,733 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 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] [2019-10-13 17:41:20,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:20,943 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:20,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:20,943 INFO L82 PathProgramCache]: Analyzing trace with hash -430428529, now seen corresponding path program 8 times [2019-10-13 17:41:20,944 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:20,944 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804868521] [2019-10-13 17:41:20,945 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:20,945 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:20,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:21,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804868521] [2019-10-13 17:41:21,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827255205] [2019-10-13 17:41:21,062 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:21,141 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:21,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:21,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:41:21,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:21,186 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:21,187 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 17:41:21,187 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548940408] [2019-10-13 17:41:21,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:41:21,188 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:21,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:41:21,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:41:21,190 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-10-13 17:41:21,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:21,299 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-10-13 17:41:21,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:41:21,299 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-10-13 17:41:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:21,300 INFO L225 Difference]: With dead ends: 82 [2019-10-13 17:41:21,301 INFO L226 Difference]: Without dead ends: 54 [2019-10-13 17:41:21,301 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:41:21,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-13 17:41:21,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-10-13 17:41:21,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-13 17:41:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-10-13 17:41:21,313 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-10-13 17:41:21,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:21,314 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-10-13 17:41:21,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:41:21,314 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-10-13 17:41:21,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 17:41:21,316 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:21,316 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 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] [2019-10-13 17:41:21,528 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:21,528 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:21,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:21,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1875558385, now seen corresponding path program 9 times [2019-10-13 17:41:21,528 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:21,529 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590453421] [2019-10-13 17:41:21,529 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:21,529 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:21,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:21,665 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590453421] [2019-10-13 17:41:21,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597742493] [2019-10-13 17:41:21,666 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:21,735 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 17:41:21,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:21,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:41:21,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-10-13 17:41:21,787 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:21,787 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-10-13 17:41:21,787 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144688419] [2019-10-13 17:41:21,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:41:21,788 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:21,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:41:21,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:41:21,789 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-10-13 17:41:21,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:21,935 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-10-13 17:41:21,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 17:41:21,936 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-10-13 17:41:21,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:21,937 INFO L225 Difference]: With dead ends: 87 [2019-10-13 17:41:21,937 INFO L226 Difference]: Without dead ends: 59 [2019-10-13 17:41:21,938 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:41:21,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-13 17:41:21,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-10-13 17:41:21,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-13 17:41:21,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-10-13 17:41:21,949 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-10-13 17:41:21,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:21,950 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-10-13 17:41:21,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:41:21,950 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-10-13 17:41:21,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-13 17:41:21,953 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:21,953 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 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] [2019-10-13 17:41:22,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:22,154 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:22,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:22,155 INFO L82 PathProgramCache]: Analyzing trace with hash 237602385, now seen corresponding path program 10 times [2019-10-13 17:41:22,155 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:22,155 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077859934] [2019-10-13 17:41:22,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:22,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:22,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-10-13 17:41:22,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077859934] [2019-10-13 17:41:22,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34536792] [2019-10-13 17:41:22,323 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:22,418 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:22,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:22,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:41:22,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-10-13 17:41:22,538 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:22,539 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-10-13 17:41:22,539 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284152428] [2019-10-13 17:41:22,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:41:22,540 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:22,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:41:22,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:41:22,541 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-10-13 17:41:22,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:22,815 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-10-13 17:41:22,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 17:41:22,816 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-10-13 17:41:22,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:22,817 INFO L225 Difference]: With dead ends: 93 [2019-10-13 17:41:22,817 INFO L226 Difference]: Without dead ends: 63 [2019-10-13 17:41:22,818 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:41:22,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-13 17:41:22,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-10-13 17:41:22,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 17:41:22,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-10-13 17:41:22,826 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-10-13 17:41:22,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:22,826 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-10-13 17:41:22,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:41:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-10-13 17:41:22,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-13 17:41:22,827 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:22,828 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 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] [2019-10-13 17:41:23,032 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:23,032 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:23,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:23,032 INFO L82 PathProgramCache]: Analyzing trace with hash 537663665, now seen corresponding path program 11 times [2019-10-13 17:41:23,032 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:23,033 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672484152] [2019-10-13 17:41:23,033 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:23,033 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:23,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-10-13 17:41:23,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672484152] [2019-10-13 17:41:23,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794861144] [2019-10-13 17:41:23,182 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:23,437 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-13 17:41:23,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:23,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:41:23,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-13 17:41:23,539 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:23,539 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-10-13 17:41:23,539 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485681946] [2019-10-13 17:41:23,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:41:23,540 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:23,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:41:23,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:41:23,541 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-10-13 17:41:23,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:23,803 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-10-13 17:41:23,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:41:23,804 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-10-13 17:41:23,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:23,805 INFO L225 Difference]: With dead ends: 99 [2019-10-13 17:41:23,805 INFO L226 Difference]: Without dead ends: 67 [2019-10-13 17:41:23,807 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:41:23,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-13 17:41:23,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-10-13 17:41:23,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-13 17:41:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-10-13 17:41:23,813 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-10-13 17:41:23,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:23,813 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-10-13 17:41:23,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:41:23,813 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-10-13 17:41:23,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 17:41:23,814 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:23,814 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 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] [2019-10-13 17:41:24,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:24,019 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:24,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:24,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1797792017, now seen corresponding path program 12 times [2019-10-13 17:41:24,019 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:24,020 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707793890] [2019-10-13 17:41:24,020 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:24,020 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:24,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-13 17:41:24,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707793890] [2019-10-13 17:41:24,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083815537] [2019-10-13 17:41:24,223 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:24,366 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-13 17:41:24,366 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:24,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:41:24,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-10-13 17:41:24,435 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:24,436 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-10-13 17:41:24,436 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372691240] [2019-10-13 17:41:24,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:41:24,436 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:24,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:41:24,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:41:24,437 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-10-13 17:41:24,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:24,616 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-10-13 17:41:24,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:41:24,617 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-10-13 17:41:24,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:24,618 INFO L225 Difference]: With dead ends: 105 [2019-10-13 17:41:24,618 INFO L226 Difference]: Without dead ends: 71 [2019-10-13 17:41:24,619 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:41:24,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-13 17:41:24,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-10-13 17:41:24,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-13 17:41:24,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-10-13 17:41:24,625 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-10-13 17:41:24,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:24,625 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-10-13 17:41:24,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:41:24,625 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-10-13 17:41:24,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-13 17:41:24,627 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:24,627 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 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] [2019-10-13 17:41:24,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:24,828 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:24,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:24,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1464793713, now seen corresponding path program 13 times [2019-10-13 17:41:24,828 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:24,828 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551766281] [2019-10-13 17:41:24,828 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:24,828 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:24,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:25,014 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551766281] [2019-10-13 17:41:25,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131903585] [2019-10-13 17:41:25,015 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:41:25,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:25,112 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:25,112 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-13 17:41:25,113 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153479473] [2019-10-13 17:41:25,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:41:25,113 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:25,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:41:25,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:41:25,114 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-10-13 17:41:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:25,236 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-10-13 17:41:25,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:41:25,237 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-10-13 17:41:25,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:25,238 INFO L225 Difference]: With dead ends: 108 [2019-10-13 17:41:25,238 INFO L226 Difference]: Without dead ends: 72 [2019-10-13 17:41:25,239 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:41:25,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-13 17:41:25,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-10-13 17:41:25,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-13 17:41:25,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-10-13 17:41:25,244 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-10-13 17:41:25,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:25,245 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-10-13 17:41:25,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:41:25,245 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-10-13 17:41:25,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-13 17:41:25,246 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:25,246 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 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] [2019-10-13 17:41:25,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:25,450 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:25,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:25,451 INFO L82 PathProgramCache]: Analyzing trace with hash -238635693, now seen corresponding path program 14 times [2019-10-13 17:41:25,451 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:25,452 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518025681] [2019-10-13 17:41:25,452 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:25,452 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:25,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:25,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518025681] [2019-10-13 17:41:25,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099709757] [2019-10-13 17:41:25,650 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:25,725 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:25,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:25,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:41:25,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:25,754 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:25,754 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-13 17:41:25,754 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008577948] [2019-10-13 17:41:25,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:41:25,754 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:25,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:41:25,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:41:25,755 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-10-13 17:41:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:25,871 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-10-13 17:41:25,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:41:25,872 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-10-13 17:41:25,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:25,873 INFO L225 Difference]: With dead ends: 110 [2019-10-13 17:41:25,873 INFO L226 Difference]: Without dead ends: 74 [2019-10-13 17:41:25,873 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:41:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-13 17:41:25,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-13 17:41:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-13 17:41:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-10-13 17:41:25,879 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-10-13 17:41:25,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:25,879 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-10-13 17:41:25,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:41:25,879 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-10-13 17:41:25,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-13 17:41:25,880 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:25,881 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 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] [2019-10-13 17:41:26,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:26,085 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:26,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:26,085 INFO L82 PathProgramCache]: Analyzing trace with hash -851755083, now seen corresponding path program 15 times [2019-10-13 17:41:26,085 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:26,086 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444503379] [2019-10-13 17:41:26,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:26,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:26,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:26,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444503379] [2019-10-13 17:41:26,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209070757] [2019-10-13 17:41:26,283 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:26,361 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 17:41:26,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:26,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:41:26,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-10-13 17:41:26,443 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:26,444 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-10-13 17:41:26,444 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515751807] [2019-10-13 17:41:26,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 17:41:26,444 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:26,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 17:41:26,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:41:26,445 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-10-13 17:41:26,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:26,651 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-10-13 17:41:26,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 17:41:26,651 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-10-13 17:41:26,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:26,653 INFO L225 Difference]: With dead ends: 115 [2019-10-13 17:41:26,653 INFO L226 Difference]: Without dead ends: 79 [2019-10-13 17:41:26,654 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:41:26,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-13 17:41:26,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-10-13 17:41:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-13 17:41:26,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-10-13 17:41:26,659 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-10-13 17:41:26,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:26,659 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-10-13 17:41:26,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 17:41:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-10-13 17:41:26,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 17:41:26,660 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:26,660 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 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] [2019-10-13 17:41:26,863 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:26,864 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:26,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:26,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1460436501, now seen corresponding path program 16 times [2019-10-13 17:41:26,865 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:26,865 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540033048] [2019-10-13 17:41:26,865 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:26,865 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:26,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-13 17:41:27,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540033048] [2019-10-13 17:41:27,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308549256] [2019-10-13 17:41:27,077 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:27,155 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:27,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:27,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:41:27,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-13 17:41:27,188 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:27,188 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-13 17:41:27,188 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57984580] [2019-10-13 17:41:27,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:41:27,189 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:27,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:41:27,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:41:27,190 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-10-13 17:41:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:27,361 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-10-13 17:41:27,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:41:27,362 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-10-13 17:41:27,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:27,362 INFO L225 Difference]: With dead ends: 118 [2019-10-13 17:41:27,362 INFO L226 Difference]: Without dead ends: 80 [2019-10-13 17:41:27,363 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:41:27,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-13 17:41:27,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-10-13 17:41:27,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-13 17:41:27,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-10-13 17:41:27,368 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-10-13 17:41:27,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:27,368 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-10-13 17:41:27,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:41:27,369 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-10-13 17:41:27,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-13 17:41:27,370 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:27,370 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 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] [2019-10-13 17:41:27,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:27,574 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:27,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:27,575 INFO L82 PathProgramCache]: Analyzing trace with hash 664024823, now seen corresponding path program 17 times [2019-10-13 17:41:27,575 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:27,576 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36572686] [2019-10-13 17:41:27,576 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:27,576 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:27,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-13 17:41:27,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36572686] [2019-10-13 17:41:27,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836314015] [2019-10-13 17:41:27,871 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 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 [2019-10-13 17:41:28,776 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-13 17:41:28,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:28,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:41:28,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-10-13 17:41:28,889 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:28,889 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-10-13 17:41:28,890 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321516585] [2019-10-13 17:41:28,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 17:41:28,890 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:28,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 17:41:28,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:41:28,891 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-10-13 17:41:29,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:29,230 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-10-13 17:41:29,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-13 17:41:29,236 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-10-13 17:41:29,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:29,237 INFO L225 Difference]: With dead ends: 123 [2019-10-13 17:41:29,237 INFO L226 Difference]: Without dead ends: 85 [2019-10-13 17:41:29,237 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 17:41:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-13 17:41:29,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-10-13 17:41:29,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-13 17:41:29,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-13 17:41:29,242 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-10-13 17:41:29,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:29,243 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-13 17:41:29,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 17:41:29,243 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-13 17:41:29,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 17:41:29,244 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:29,244 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 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] [2019-10-13 17:41:29,444 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:29,445 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:29,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:29,446 INFO L82 PathProgramCache]: Analyzing trace with hash -683189417, now seen corresponding path program 18 times [2019-10-13 17:41:29,446 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:29,446 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264721063] [2019-10-13 17:41:29,446 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:29,447 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:29,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-10-13 17:41:29,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264721063] [2019-10-13 17:41:29,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466351419] [2019-10-13 17:41:29,785 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:30,330 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-13 17:41:30,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:30,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:41:30,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 269 proven. 25 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-13 17:41:30,466 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:30,466 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 30 [2019-10-13 17:41:30,467 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175654229] [2019-10-13 17:41:30,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 17:41:30,468 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:30,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 17:41:30,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:41:30,469 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 30 states. [2019-10-13 17:41:30,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:30,873 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2019-10-13 17:41:30,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 17:41:30,877 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 120 [2019-10-13 17:41:30,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:30,878 INFO L225 Difference]: With dead ends: 130 [2019-10-13 17:41:30,878 INFO L226 Difference]: Without dead ends: 90 [2019-10-13 17:41:30,879 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=336, Invalid=924, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:41:30,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-13 17:41:30,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-10-13 17:41:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-13 17:41:30,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-10-13 17:41:30,889 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 120 [2019-10-13 17:41:30,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:30,890 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-10-13 17:41:30,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 17:41:30,892 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-10-13 17:41:30,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 17:41:30,893 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:30,894 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 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] [2019-10-13 17:41:31,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:31,095 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:31,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:31,096 INFO L82 PathProgramCache]: Analyzing trace with hash -258630887, now seen corresponding path program 19 times [2019-10-13 17:41:31,096 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:31,096 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428974494] [2019-10-13 17:41:31,096 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:31,097 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:31,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:31,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428974494] [2019-10-13 17:41:31,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259563607] [2019-10-13 17:41:31,383 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:31,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 17:41:31,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:31,498 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:31,498 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-13 17:41:31,499 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773419432] [2019-10-13 17:41:31,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 17:41:31,499 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:31,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 17:41:31,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:41:31,500 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-10-13 17:41:31,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:31,618 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-10-13 17:41:31,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 17:41:31,619 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-10-13 17:41:31,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:31,620 INFO L225 Difference]: With dead ends: 134 [2019-10-13 17:41:31,620 INFO L226 Difference]: Without dead ends: 92 [2019-10-13 17:41:31,621 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:41:31,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-13 17:41:31,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-10-13 17:41:31,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-13 17:41:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-10-13 17:41:31,627 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-10-13 17:41:31,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:31,627 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-10-13 17:41:31,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 17:41:31,628 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-10-13 17:41:31,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-13 17:41:31,628 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:31,628 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 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] [2019-10-13 17:41:31,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:31,830 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:31,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:31,830 INFO L82 PathProgramCache]: Analyzing trace with hash 547573755, now seen corresponding path program 20 times [2019-10-13 17:41:31,831 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:31,831 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943807239] [2019-10-13 17:41:31,831 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:31,832 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:31,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:32,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943807239] [2019-10-13 17:41:32,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676342610] [2019-10-13 17:41:32,156 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:32,282 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:32,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:32,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 17:41:32,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:32,355 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:32,355 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2019-10-13 17:41:32,355 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530638025] [2019-10-13 17:41:32,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-13 17:41:32,356 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:32,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-13 17:41:32,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:41:32,357 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 26 states. [2019-10-13 17:41:32,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:32,542 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2019-10-13 17:41:32,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 17:41:32,542 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 128 [2019-10-13 17:41:32,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:32,544 INFO L225 Difference]: With dead ends: 136 [2019-10-13 17:41:32,544 INFO L226 Difference]: Without dead ends: 94 [2019-10-13 17:41:32,545 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:41:32,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-13 17:41:32,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-10-13 17:41:32,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-13 17:41:32,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2019-10-13 17:41:32,551 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 128 [2019-10-13 17:41:32,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:32,551 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2019-10-13 17:41:32,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-13 17:41:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2019-10-13 17:41:32,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 17:41:32,553 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:32,553 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 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] [2019-10-13 17:41:32,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:32,757 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:32,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:32,758 INFO L82 PathProgramCache]: Analyzing trace with hash -2078845859, now seen corresponding path program 21 times [2019-10-13 17:41:32,758 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:32,758 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580348914] [2019-10-13 17:41:32,758 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:32,759 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:32,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:33,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580348914] [2019-10-13 17:41:33,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538343436] [2019-10-13 17:41:33,058 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:33,190 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-13 17:41:33,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:33,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:41:33,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2019-10-13 17:41:33,332 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:33,332 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2019-10-13 17:41:33,332 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322910294] [2019-10-13 17:41:33,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-13 17:41:33,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:33,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-13 17:41:33,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:41:33,335 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 33 states. [2019-10-13 17:41:33,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:33,671 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2019-10-13 17:41:33,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-13 17:41:33,672 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 130 [2019-10-13 17:41:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:33,673 INFO L225 Difference]: With dead ends: 141 [2019-10-13 17:41:33,673 INFO L226 Difference]: Without dead ends: 99 [2019-10-13 17:41:33,674 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:41:33,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-13 17:41:33,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2019-10-13 17:41:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-13 17:41:33,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-10-13 17:41:33,681 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 130 [2019-10-13 17:41:33,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:33,681 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-10-13 17:41:33,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-13 17:41:33,681 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-10-13 17:41:33,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 17:41:33,682 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:33,682 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 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] [2019-10-13 17:41:33,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:33,887 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:33,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:33,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1781960003, now seen corresponding path program 22 times [2019-10-13 17:41:33,888 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:33,888 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118553439] [2019-10-13 17:41:33,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:33,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:33,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-13 17:41:34,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118553439] [2019-10-13 17:41:34,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610734517] [2019-10-13 17:41:34,224 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:34,325 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:34,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:34,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-13 17:41:34,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-13 17:41:34,389 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:34,389 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-10-13 17:41:34,389 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649704900] [2019-10-13 17:41:34,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 17:41:34,390 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:34,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 17:41:34,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:41:34,391 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 28 states. [2019-10-13 17:41:34,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:34,622 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-10-13 17:41:34,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 17:41:34,622 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 134 [2019-10-13 17:41:34,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:34,623 INFO L225 Difference]: With dead ends: 144 [2019-10-13 17:41:34,624 INFO L226 Difference]: Without dead ends: 100 [2019-10-13 17:41:34,625 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:41:34,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-13 17:41:34,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-10-13 17:41:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-13 17:41:34,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2019-10-13 17:41:34,630 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 134 [2019-10-13 17:41:34,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:34,630 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2019-10-13 17:41:34,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 17:41:34,631 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2019-10-13 17:41:34,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-13 17:41:34,631 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:34,632 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 21, 21, 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] [2019-10-13 17:41:34,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:34,836 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:34,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:34,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1800218015, now seen corresponding path program 23 times [2019-10-13 17:41:34,838 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:34,838 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68215870] [2019-10-13 17:41:34,838 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:34,838 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:34,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-13 17:41:35,210 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68215870] [2019-10-13 17:41:35,210 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207533208] [2019-10-13 17:41:35,210 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:39,633 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-10-13 17:41:39,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:39,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:41:39,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2019-10-13 17:41:39,798 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:39,798 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-10-13 17:41:39,799 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543561452] [2019-10-13 17:41:39,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-13 17:41:39,799 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:39,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-13 17:41:39,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:41:39,800 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 36 states. [2019-10-13 17:41:40,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:40,368 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2019-10-13 17:41:40,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-13 17:41:40,369 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 136 [2019-10-13 17:41:40,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:40,370 INFO L225 Difference]: With dead ends: 149 [2019-10-13 17:41:40,370 INFO L226 Difference]: Without dead ends: 105 [2019-10-13 17:41:40,372 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2019-10-13 17:41:40,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-13 17:41:40,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2019-10-13 17:41:40,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-13 17:41:40,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2019-10-13 17:41:40,378 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 136 [2019-10-13 17:41:40,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:40,379 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2019-10-13 17:41:40,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-13 17:41:40,379 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2019-10-13 17:41:40,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 17:41:40,385 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:40,385 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 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] [2019-10-13 17:41:40,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:40,593 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:40,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:40,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1521279999, now seen corresponding path program 24 times [2019-10-13 17:41:40,594 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:40,594 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925744617] [2019-10-13 17:41:40,594 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:40,594 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:40,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-10-13 17:41:40,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925744617] [2019-10-13 17:41:40,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782795633] [2019-10-13 17:41:40,990 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:41,889 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-13 17:41:41,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:41,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:41:41,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 953 trivial. 0 not checked. [2019-10-13 17:41:42,046 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:42,046 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11] total 38 [2019-10-13 17:41:42,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880771287] [2019-10-13 17:41:42,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-13 17:41:42,047 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:42,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-13 17:41:42,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=972, Unknown=0, NotChecked=0, Total=1406 [2019-10-13 17:41:42,048 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 38 states. [2019-10-13 17:41:42,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:42,582 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2019-10-13 17:41:42,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-13 17:41:42,582 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 144 [2019-10-13 17:41:42,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:42,584 INFO L225 Difference]: With dead ends: 155 [2019-10-13 17:41:42,584 INFO L226 Difference]: Without dead ends: 109 [2019-10-13 17:41:42,585 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=542, Invalid=1620, Unknown=0, NotChecked=0, Total=2162 [2019-10-13 17:41:42,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-10-13 17:41:42,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2019-10-13 17:41:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-13 17:41:42,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-10-13 17:41:42,592 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 144 [2019-10-13 17:41:42,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:42,592 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-10-13 17:41:42,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-13 17:41:42,592 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-10-13 17:41:42,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 17:41:42,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:42,595 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 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] [2019-10-13 17:41:42,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:42,800 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:42,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:42,801 INFO L82 PathProgramCache]: Analyzing trace with hash -910092193, now seen corresponding path program 25 times [2019-10-13 17:41:42,801 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:42,801 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451196439] [2019-10-13 17:41:42,802 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:42,802 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:42,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-13 17:41:43,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451196439] [2019-10-13 17:41:43,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042759736] [2019-10-13 17:41:43,264 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:43,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-13 17:41:43,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-13 17:41:43,455 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:43,455 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-13 17:41:43,456 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730947529] [2019-10-13 17:41:43,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-13 17:41:43,457 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:43,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-13 17:41:43,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:41:43,458 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-10-13 17:41:43,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:43,691 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-10-13 17:41:43,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 17:41:43,692 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 152 [2019-10-13 17:41:43,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:43,693 INFO L225 Difference]: With dead ends: 158 [2019-10-13 17:41:43,693 INFO L226 Difference]: Without dead ends: 110 [2019-10-13 17:41:43,694 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:41:43,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-13 17:41:43,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-10-13 17:41:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-13 17:41:43,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-10-13 17:41:43,701 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 152 [2019-10-13 17:41:43,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:43,701 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-10-13 17:41:43,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-13 17:41:43,701 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-10-13 17:41:43,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 17:41:43,702 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:43,703 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 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] [2019-10-13 17:41:43,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:43,907 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:43,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:43,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1827051201, now seen corresponding path program 26 times [2019-10-13 17:41:43,907 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:43,907 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20804688] [2019-10-13 17:41:43,908 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:43,908 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:43,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-13 17:41:44,378 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20804688] [2019-10-13 17:41:44,378 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874280533] [2019-10-13 17:41:44,378 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 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 [2019-10-13 17:41:44,493 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:44,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:44,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 17:41:44,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-13 17:41:44,530 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:44,530 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2019-10-13 17:41:44,530 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308909049] [2019-10-13 17:41:44,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-13 17:41:44,531 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:44,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-13 17:41:44,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-13 17:41:44,532 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 32 states. [2019-10-13 17:41:44,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:44,766 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2019-10-13 17:41:44,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-13 17:41:44,766 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 154 [2019-10-13 17:41:44,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:44,768 INFO L225 Difference]: With dead ends: 160 [2019-10-13 17:41:44,768 INFO L226 Difference]: Without dead ends: 112 [2019-10-13 17:41:44,769 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-13 17:41:44,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-10-13 17:41:44,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2019-10-13 17:41:44,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-13 17:41:44,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2019-10-13 17:41:44,775 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 154 [2019-10-13 17:41:44,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:44,775 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2019-10-13 17:41:44,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-13 17:41:44,775 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2019-10-13 17:41:44,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 17:41:44,776 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:44,776 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 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] [2019-10-13 17:41:44,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:44,980 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:44,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:44,981 INFO L82 PathProgramCache]: Analyzing trace with hash -593099613, now seen corresponding path program 27 times [2019-10-13 17:41:44,981 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:44,981 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871603387] [2019-10-13 17:41:44,982 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:44,982 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:44,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-10-13 17:41:45,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871603387] [2019-10-13 17:41:45,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511627017] [2019-10-13 17:41:45,466 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 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 [2019-10-13 17:41:45,668 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-13 17:41:45,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:45,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:41:45,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 370 proven. 49 refuted. 0 times theorem prover too weak. 1212 trivial. 0 not checked. [2019-10-13 17:41:45,829 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:45,830 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 10] total 40 [2019-10-13 17:41:45,830 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310220561] [2019-10-13 17:41:45,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-13 17:41:45,830 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:45,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-13 17:41:45,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2019-10-13 17:41:45,831 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 40 states. [2019-10-13 17:41:46,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:46,190 INFO L93 Difference]: Finished difference Result 165 states and 174 transitions. [2019-10-13 17:41:46,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-13 17:41:46,190 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 156 [2019-10-13 17:41:46,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:46,191 INFO L225 Difference]: With dead ends: 165 [2019-10-13 17:41:46,192 INFO L226 Difference]: Without dead ends: 117 [2019-10-13 17:41:46,193 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2019-10-13 17:41:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-13 17:41:46,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2019-10-13 17:41:46,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-10-13 17:41:46,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2019-10-13 17:41:46,199 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 156 [2019-10-13 17:41:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:46,200 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2019-10-13 17:41:46,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-13 17:41:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2019-10-13 17:41:46,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-13 17:41:46,202 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:46,202 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 27, 27, 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] [2019-10-13 17:41:46,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:46,409 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:46,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:46,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1573539069, now seen corresponding path program 28 times [2019-10-13 17:41:46,410 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:46,410 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794517910] [2019-10-13 17:41:46,410 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:46,411 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:46,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-10-13 17:41:47,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794517910] [2019-10-13 17:41:47,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146450834] [2019-10-13 17:41:47,173 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 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 [2019-10-13 17:41:47,289 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:47,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:47,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:41:47,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2019-10-13 17:41:47,637 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:47,637 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 12] total 43 [2019-10-13 17:41:47,637 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401612453] [2019-10-13 17:41:47,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-13 17:41:47,638 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:47,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-13 17:41:47,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=1243, Unknown=0, NotChecked=0, Total=1806 [2019-10-13 17:41:47,640 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand 43 states. [2019-10-13 17:41:48,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:48,284 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2019-10-13 17:41:48,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-13 17:41:48,284 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 160 [2019-10-13 17:41:48,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:48,285 INFO L225 Difference]: With dead ends: 171 [2019-10-13 17:41:48,285 INFO L226 Difference]: Without dead ends: 121 [2019-10-13 17:41:48,288 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2019-10-13 17:41:48,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-10-13 17:41:48,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2019-10-13 17:41:48,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-13 17:41:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2019-10-13 17:41:48,297 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 160 [2019-10-13 17:41:48,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:48,298 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2019-10-13 17:41:48,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-13 17:41:48,298 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2019-10-13 17:41:48,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-13 17:41:48,299 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:48,300 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 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] [2019-10-13 17:41:48,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:48,504 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:48,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:48,504 INFO L82 PathProgramCache]: Analyzing trace with hash -451694749, now seen corresponding path program 29 times [2019-10-13 17:41:48,505 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:48,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127162802] [2019-10-13 17:41:48,505 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:48,505 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:48,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-10-13 17:41:49,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127162802] [2019-10-13 17:41:49,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775782560] [2019-10-13 17:41:49,010 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 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