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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:44:30,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:44:30,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:44:30,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:44:30,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:44:30,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:44:30,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:44:30,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:44:30,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:44:30,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:44:30,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:44:30,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:44:30,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:44:30,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:44:30,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:44:30,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:44:30,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:44:30,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:44:30,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:44:30,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:44:30,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:44:30,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:44:30,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:44:30,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:44:30,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:44:30,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:44:30,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:44:30,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:44:30,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:44:30,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:44:30,096 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:44:30,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:44:30,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:44:30,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:44:30,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:44:30,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:44:30,104 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:44:30,119 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:44:30,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:44:30,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:44:30,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:44:30,121 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:44:30,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:44:30,121 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:44:30,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:44:30,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:44:30,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:44:30,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:44:30,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:44:30,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:44:30,123 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:44:30,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:44:30,123 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:44:30,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:44:30,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:44:30,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:44:30,124 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:44:30,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:44:30,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:44:30,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:44:30,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:44:30,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:44:30,125 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:44:30,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:44:30,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:44:30,126 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:44:30,437 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:44:30,457 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:44:30,461 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:44:30,462 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:44:30,462 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:44:30,463 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-10-14 23:44:30,536 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd19c77a6/7a43c1b949894926acb72e47f79f6731/FLAGdbf435179 [2019-10-14 23:44:31,069 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:44:31,070 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-10-14 23:44:31,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd19c77a6/7a43c1b949894926acb72e47f79f6731/FLAGdbf435179 [2019-10-14 23:44:31,407 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd19c77a6/7a43c1b949894926acb72e47f79f6731 [2019-10-14 23:44:31,417 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:44:31,418 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:44:31,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:44:31,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:44:31,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:44:31,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:44:31" (1/1) ... [2019-10-14 23:44:31,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@145dab92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:31, skipping insertion in model container [2019-10-14 23:44:31,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:44:31" (1/1) ... [2019-10-14 23:44:31,431 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:44:31,480 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:44:31,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:44:31,835 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:44:31,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:44:31,929 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:44:31,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:31 WrapperNode [2019-10-14 23:44:31,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:44:31,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:44:31,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:44:31,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:44:31,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:31" (1/1) ... [2019-10-14 23:44:31,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:31" (1/1) ... [2019-10-14 23:44:31,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:31" (1/1) ... [2019-10-14 23:44:31,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:31" (1/1) ... [2019-10-14 23:44:31,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:31" (1/1) ... [2019-10-14 23:44:31,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:31" (1/1) ... [2019-10-14 23:44:31,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:31" (1/1) ... [2019-10-14 23:44:31,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:44:31,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:44:31,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:44:31,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:44:31,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:44:32,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:44:32,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:44:32,029 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:44:32,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:44:32,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-10-14 23:44:32,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-14 23:44:32,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-10-14 23:44:32,030 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-10-14 23:44:32,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:44:32,031 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-10-14 23:44:32,031 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-10-14 23:44:32,031 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-10-14 23:44:32,032 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-10-14 23:44:32,032 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-10-14 23:44:32,032 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-10-14 23:44:32,032 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-10-14 23:44:32,032 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:44:32,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:44:32,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:44:32,562 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:44:32,563 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-14 23:44:32,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:44:32 BoogieIcfgContainer [2019-10-14 23:44:32,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:44:32,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:44:32,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:44:32,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:44:32,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:44:31" (1/3) ... [2019-10-14 23:44:32,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f564c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:44:32, skipping insertion in model container [2019-10-14 23:44:32,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:31" (2/3) ... [2019-10-14 23:44:32,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f564c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:44:32, skipping insertion in model container [2019-10-14 23:44:32,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:44:32" (3/3) ... [2019-10-14 23:44:32,573 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-10-14 23:44:32,583 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:44:32,592 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:44:32,602 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:44:32,629 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:44:32,629 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:44:32,630 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:44:32,630 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:44:32,630 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:44:32,630 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:44:32,631 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:44:32,631 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:44:32,651 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2019-10-14 23:44:32,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 23:44:32,658 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:32,659 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:32,660 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:32,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:32,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1555775493, now seen corresponding path program 1 times [2019-10-14 23:44:32,672 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:32,672 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14290919] [2019-10-14 23:44:32,672 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:32,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:32,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:33,162 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2019-10-14 23:44:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:33,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14290919] [2019-10-14 23:44:33,234 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:33,234 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:44:33,234 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640821891] [2019-10-14 23:44:33,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:44:33,241 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:33,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:44:33,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:44:33,259 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 4 states. [2019-10-14 23:44:33,445 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2019-10-14 23:44:33,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:33,897 INFO L93 Difference]: Finished difference Result 197 states and 307 transitions. [2019-10-14 23:44:33,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:44:33,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2019-10-14 23:44:33,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:33,913 INFO L225 Difference]: With dead ends: 197 [2019-10-14 23:44:33,913 INFO L226 Difference]: Without dead ends: 126 [2019-10-14 23:44:33,917 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:44:33,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-14 23:44:33,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2019-10-14 23:44:33,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-10-14 23:44:33,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 182 transitions. [2019-10-14 23:44:33,979 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 182 transitions. Word has length 41 [2019-10-14 23:44:33,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:33,980 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 182 transitions. [2019-10-14 23:44:33,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:44:33,983 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 182 transitions. [2019-10-14 23:44:33,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 23:44:33,985 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:33,986 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:33,986 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:33,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:33,987 INFO L82 PathProgramCache]: Analyzing trace with hash 477079428, now seen corresponding path program 1 times [2019-10-14 23:44:33,987 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:33,988 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5117579] [2019-10-14 23:44:33,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:33,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:33,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:34,229 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5117579] [2019-10-14 23:44:34,230 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:34,230 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:44:34,230 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501707720] [2019-10-14 23:44:34,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:44:34,232 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:34,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:44:34,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:44:34,233 INFO L87 Difference]: Start difference. First operand 124 states and 182 transitions. Second operand 4 states. [2019-10-14 23:44:34,403 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2019-10-14 23:44:34,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:34,751 INFO L93 Difference]: Finished difference Result 292 states and 446 transitions. [2019-10-14 23:44:34,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:44:34,751 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2019-10-14 23:44:34,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:34,754 INFO L225 Difference]: With dead ends: 292 [2019-10-14 23:44:34,754 INFO L226 Difference]: Without dead ends: 192 [2019-10-14 23:44:34,756 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:44:34,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-10-14 23:44:34,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2019-10-14 23:44:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-10-14 23:44:34,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 285 transitions. [2019-10-14 23:44:34,795 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 285 transitions. Word has length 42 [2019-10-14 23:44:34,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:34,796 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 285 transitions. [2019-10-14 23:44:34,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:44:34,797 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 285 transitions. [2019-10-14 23:44:34,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 23:44:34,801 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:34,801 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:34,802 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:34,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:34,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1738555772, now seen corresponding path program 1 times [2019-10-14 23:44:34,803 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:34,803 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791758484] [2019-10-14 23:44:34,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:34,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:34,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:35,018 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791758484] [2019-10-14 23:44:35,019 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:35,019 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:44:35,019 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877327182] [2019-10-14 23:44:35,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:44:35,020 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:35,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:44:35,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:44:35,021 INFO L87 Difference]: Start difference. First operand 190 states and 285 transitions. Second operand 6 states. [2019-10-14 23:44:35,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:35,485 INFO L93 Difference]: Finished difference Result 854 states and 1329 transitions. [2019-10-14 23:44:35,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:44:35,486 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2019-10-14 23:44:35,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:35,491 INFO L225 Difference]: With dead ends: 854 [2019-10-14 23:44:35,492 INFO L226 Difference]: Without dead ends: 688 [2019-10-14 23:44:35,494 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:44:35,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2019-10-14 23:44:35,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 354. [2019-10-14 23:44:35,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2019-10-14 23:44:35,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 537 transitions. [2019-10-14 23:44:35,559 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 537 transitions. Word has length 43 [2019-10-14 23:44:35,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:35,559 INFO L462 AbstractCegarLoop]: Abstraction has 354 states and 537 transitions. [2019-10-14 23:44:35,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:44:35,559 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 537 transitions. [2019-10-14 23:44:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 23:44:35,561 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:35,561 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:35,562 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:35,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:35,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1920813121, now seen corresponding path program 1 times [2019-10-14 23:44:35,563 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:35,563 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879696221] [2019-10-14 23:44:35,563 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:35,563 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:35,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:35,790 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879696221] [2019-10-14 23:44:35,790 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:35,790 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:44:35,790 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399023941] [2019-10-14 23:44:35,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:44:35,791 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:35,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:44:35,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:44:35,792 INFO L87 Difference]: Start difference. First operand 354 states and 537 transitions. Second operand 6 states. [2019-10-14 23:44:36,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:36,370 INFO L93 Difference]: Finished difference Result 1232 states and 1892 transitions. [2019-10-14 23:44:36,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:44:36,371 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-10-14 23:44:36,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:36,378 INFO L225 Difference]: With dead ends: 1232 [2019-10-14 23:44:36,379 INFO L226 Difference]: Without dead ends: 902 [2019-10-14 23:44:36,383 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:44:36,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2019-10-14 23:44:36,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 898. [2019-10-14 23:44:36,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2019-10-14 23:44:36,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1369 transitions. [2019-10-14 23:44:36,451 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1369 transitions. Word has length 44 [2019-10-14 23:44:36,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:36,452 INFO L462 AbstractCegarLoop]: Abstraction has 898 states and 1369 transitions. [2019-10-14 23:44:36,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:44:36,452 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1369 transitions. [2019-10-14 23:44:36,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:44:36,463 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:36,463 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:36,463 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:36,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:36,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1112409250, now seen corresponding path program 1 times [2019-10-14 23:44:36,464 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:36,464 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853974498] [2019-10-14 23:44:36,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:36,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:36,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:36,622 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853974498] [2019-10-14 23:44:36,623 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:36,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:44:36,623 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362793838] [2019-10-14 23:44:36,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:44:36,624 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:36,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:44:36,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:44:36,624 INFO L87 Difference]: Start difference. First operand 898 states and 1369 transitions. Second operand 4 states. [2019-10-14 23:44:37,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:37,206 INFO L93 Difference]: Finished difference Result 2334 states and 3555 transitions. [2019-10-14 23:44:37,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:44:37,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2019-10-14 23:44:37,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:37,215 INFO L225 Difference]: With dead ends: 2334 [2019-10-14 23:44:37,215 INFO L226 Difference]: Without dead ends: 1460 [2019-10-14 23:44:37,217 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:44:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2019-10-14 23:44:37,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1458. [2019-10-14 23:44:37,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1458 states. [2019-10-14 23:44:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 2185 transitions. [2019-10-14 23:44:37,299 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 2185 transitions. Word has length 46 [2019-10-14 23:44:37,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:37,299 INFO L462 AbstractCegarLoop]: Abstraction has 1458 states and 2185 transitions. [2019-10-14 23:44:37,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:44:37,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 2185 transitions. [2019-10-14 23:44:37,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:44:37,301 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:37,301 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:37,301 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:37,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:37,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1926406488, now seen corresponding path program 1 times [2019-10-14 23:44:37,302 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:37,302 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901912523] [2019-10-14 23:44:37,302 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:37,302 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:37,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:37,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901912523] [2019-10-14 23:44:37,471 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:37,471 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:44:37,471 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077714030] [2019-10-14 23:44:37,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:44:37,472 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:37,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:44:37,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:44:37,473 INFO L87 Difference]: Start difference. First operand 1458 states and 2185 transitions. Second operand 7 states. [2019-10-14 23:44:37,610 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2019-10-14 23:44:38,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:38,306 INFO L93 Difference]: Finished difference Result 5648 states and 8476 transitions. [2019-10-14 23:44:38,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:44:38,308 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2019-10-14 23:44:38,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:38,332 INFO L225 Difference]: With dead ends: 5648 [2019-10-14 23:44:38,333 INFO L226 Difference]: Without dead ends: 4214 [2019-10-14 23:44:38,338 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:44:38,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4214 states. [2019-10-14 23:44:38,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4214 to 4210. [2019-10-14 23:44:38,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4210 states. [2019-10-14 23:44:38,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4210 states to 4210 states and 6281 transitions. [2019-10-14 23:44:38,728 INFO L78 Accepts]: Start accepts. Automaton has 4210 states and 6281 transitions. Word has length 46 [2019-10-14 23:44:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:38,731 INFO L462 AbstractCegarLoop]: Abstraction has 4210 states and 6281 transitions. [2019-10-14 23:44:38,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:44:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 4210 states and 6281 transitions. [2019-10-14 23:44:38,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:44:38,733 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:38,733 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:38,733 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:38,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:38,734 INFO L82 PathProgramCache]: Analyzing trace with hash -742396141, now seen corresponding path program 1 times [2019-10-14 23:44:38,734 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:38,734 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130257743] [2019-10-14 23:44:38,735 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:38,735 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:38,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:38,993 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2019-10-14 23:44:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:39,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130257743] [2019-10-14 23:44:39,010 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:39,011 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:44:39,011 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851139532] [2019-10-14 23:44:39,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:44:39,012 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:39,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:44:39,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:44:39,013 INFO L87 Difference]: Start difference. First operand 4210 states and 6281 transitions. Second operand 6 states. [2019-10-14 23:44:40,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:40,191 INFO L93 Difference]: Finished difference Result 8684 states and 12826 transitions. [2019-10-14 23:44:40,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:44:40,192 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2019-10-14 23:44:40,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:40,251 INFO L225 Difference]: With dead ends: 8684 [2019-10-14 23:44:40,252 INFO L226 Difference]: Without dead ends: 8682 [2019-10-14 23:44:40,257 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:44:40,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8682 states. [2019-10-14 23:44:40,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8682 to 4498. [2019-10-14 23:44:40,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4498 states. [2019-10-14 23:44:40,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4498 states to 4498 states and 6569 transitions. [2019-10-14 23:44:40,915 INFO L78 Accepts]: Start accepts. Automaton has 4498 states and 6569 transitions. Word has length 46 [2019-10-14 23:44:40,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:40,916 INFO L462 AbstractCegarLoop]: Abstraction has 4498 states and 6569 transitions. [2019-10-14 23:44:40,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:44:40,916 INFO L276 IsEmpty]: Start isEmpty. Operand 4498 states and 6569 transitions. [2019-10-14 23:44:40,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 23:44:40,917 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:40,917 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:40,917 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:40,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:40,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1529824191, now seen corresponding path program 1 times [2019-10-14 23:44:40,918 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:40,918 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349040899] [2019-10-14 23:44:40,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:40,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:40,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:41,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349040899] [2019-10-14 23:44:41,062 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:41,063 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:44:41,063 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970057522] [2019-10-14 23:44:41,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:44:41,063 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:41,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:44:41,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:44:41,065 INFO L87 Difference]: Start difference. First operand 4498 states and 6569 transitions. Second operand 4 states. [2019-10-14 23:44:41,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:41,802 INFO L93 Difference]: Finished difference Result 10814 states and 15783 transitions. [2019-10-14 23:44:41,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:44:41,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-10-14 23:44:41,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:41,835 INFO L225 Difference]: With dead ends: 10814 [2019-10-14 23:44:41,835 INFO L226 Difference]: Without dead ends: 6340 [2019-10-14 23:44:41,845 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:44:41,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6340 states. [2019-10-14 23:44:42,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6340 to 6278. [2019-10-14 23:44:42,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6278 states. [2019-10-14 23:44:42,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 9057 transitions. [2019-10-14 23:44:42,317 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 9057 transitions. Word has length 47 [2019-10-14 23:44:42,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:42,318 INFO L462 AbstractCegarLoop]: Abstraction has 6278 states and 9057 transitions. [2019-10-14 23:44:42,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:44:42,319 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 9057 transitions. [2019-10-14 23:44:42,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 23:44:42,322 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:42,323 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:42,323 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:42,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:42,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1418257868, now seen corresponding path program 1 times [2019-10-14 23:44:42,324 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:42,324 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123536453] [2019-10-14 23:44:42,324 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:42,324 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:42,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:42,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:42,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123536453] [2019-10-14 23:44:42,521 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334594063] [2019-10-14 23:44:42,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:44:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:42,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:44:42,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:44:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:42,808 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:44:42,808 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-10-14 23:44:42,808 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869326672] [2019-10-14 23:44:42,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:44:42,811 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:42,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:44:42,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:44:42,812 INFO L87 Difference]: Start difference. First operand 6278 states and 9057 transitions. Second operand 12 states. [2019-10-14 23:44:43,073 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2019-10-14 23:44:44,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:44,995 INFO L93 Difference]: Finished difference Result 20769 states and 29803 transitions. [2019-10-14 23:44:44,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:44:44,996 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2019-10-14 23:44:44,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:45,045 INFO L225 Difference]: With dead ends: 20769 [2019-10-14 23:44:45,046 INFO L226 Difference]: Without dead ends: 16623 [2019-10-14 23:44:45,058 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:44:45,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16623 states. [2019-10-14 23:44:46,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16623 to 8858. [2019-10-14 23:44:46,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8858 states. [2019-10-14 23:44:46,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8858 states to 8858 states and 12721 transitions. [2019-10-14 23:44:46,125 INFO L78 Accepts]: Start accepts. Automaton has 8858 states and 12721 transitions. Word has length 65 [2019-10-14 23:44:46,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:46,126 INFO L462 AbstractCegarLoop]: Abstraction has 8858 states and 12721 transitions. [2019-10-14 23:44:46,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:44:46,126 INFO L276 IsEmpty]: Start isEmpty. Operand 8858 states and 12721 transitions. [2019-10-14 23:44:46,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 23:44:46,129 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:46,130 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:46,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:44:46,337 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:46,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:46,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1905093699, now seen corresponding path program 1 times [2019-10-14 23:44:46,338 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:46,338 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724472030] [2019-10-14 23:44:46,338 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:46,338 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:46,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:46,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724472030] [2019-10-14 23:44:46,467 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:46,467 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:44:46,467 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036444188] [2019-10-14 23:44:46,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:44:46,468 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:46,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:44:46,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:44:46,468 INFO L87 Difference]: Start difference. First operand 8858 states and 12721 transitions. Second operand 4 states. [2019-10-14 23:44:47,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:47,757 INFO L93 Difference]: Finished difference Result 14166 states and 20229 transitions. [2019-10-14 23:44:47,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:44:47,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2019-10-14 23:44:47,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:47,779 INFO L225 Difference]: With dead ends: 14166 [2019-10-14 23:44:47,780 INFO L226 Difference]: Without dead ends: 9283 [2019-10-14 23:44:47,791 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:44:47,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9283 states. [2019-10-14 23:44:48,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9283 to 7819. [2019-10-14 23:44:48,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7819 states. [2019-10-14 23:44:48,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7819 states to 7819 states and 11025 transitions. [2019-10-14 23:44:48,605 INFO L78 Accepts]: Start accepts. Automaton has 7819 states and 11025 transitions. Word has length 65 [2019-10-14 23:44:48,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:48,605 INFO L462 AbstractCegarLoop]: Abstraction has 7819 states and 11025 transitions. [2019-10-14 23:44:48,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:44:48,606 INFO L276 IsEmpty]: Start isEmpty. Operand 7819 states and 11025 transitions. [2019-10-14 23:44:48,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 23:44:48,609 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:48,609 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:48,610 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:48,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:48,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1174779130, now seen corresponding path program 1 times [2019-10-14 23:44:48,610 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:48,611 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310748670] [2019-10-14 23:44:48,611 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:48,611 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:48,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:48,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310748670] [2019-10-14 23:44:48,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065184115] [2019-10-14 23:44:48,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:44:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:49,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:44:49,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:44:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:44:49,081 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:44:49,081 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2019-10-14 23:44:49,081 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574623212] [2019-10-14 23:44:49,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:44:49,082 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:49,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:44:49,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:44:49,082 INFO L87 Difference]: Start difference. First operand 7819 states and 11025 transitions. Second operand 5 states. [2019-10-14 23:44:49,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:49,914 INFO L93 Difference]: Finished difference Result 19725 states and 27791 transitions. [2019-10-14 23:44:49,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:44:49,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2019-10-14 23:44:49,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:49,940 INFO L225 Difference]: With dead ends: 19725 [2019-10-14 23:44:49,940 INFO L226 Difference]: Without dead ends: 11970 [2019-10-14 23:44:49,955 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:44:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11970 states. [2019-10-14 23:44:50,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11970 to 11857. [2019-10-14 23:44:50,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11857 states. [2019-10-14 23:44:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11857 states to 11857 states and 16607 transitions. [2019-10-14 23:44:50,746 INFO L78 Accepts]: Start accepts. Automaton has 11857 states and 16607 transitions. Word has length 65 [2019-10-14 23:44:50,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:50,746 INFO L462 AbstractCegarLoop]: Abstraction has 11857 states and 16607 transitions. [2019-10-14 23:44:50,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:44:50,746 INFO L276 IsEmpty]: Start isEmpty. Operand 11857 states and 16607 transitions. [2019-10-14 23:44:50,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 23:44:50,750 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:50,750 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:50,955 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:44:50,955 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:50,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:50,956 INFO L82 PathProgramCache]: Analyzing trace with hash 442725761, now seen corresponding path program 1 times [2019-10-14 23:44:50,956 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:50,957 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8710437] [2019-10-14 23:44:50,957 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:50,957 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:50,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:51,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8710437] [2019-10-14 23:44:51,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56203774] [2019-10-14 23:44:51,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:44:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:51,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:44:51,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:44:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:51,362 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:44:51,362 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-10-14 23:44:51,363 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29548469] [2019-10-14 23:44:51,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:44:51,364 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:51,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:44:51,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:44:51,364 INFO L87 Difference]: Start difference. First operand 11857 states and 16607 transitions. Second operand 12 states. [2019-10-14 23:44:54,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:54,131 INFO L93 Difference]: Finished difference Result 26538 states and 36961 transitions. [2019-10-14 23:44:54,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:44:54,131 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2019-10-14 23:44:54,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:54,182 INFO L225 Difference]: With dead ends: 26538 [2019-10-14 23:44:54,182 INFO L226 Difference]: Without dead ends: 22932 [2019-10-14 23:44:54,198 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:44:54,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22932 states. [2019-10-14 23:44:55,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22932 to 13263. [2019-10-14 23:44:55,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13263 states. [2019-10-14 23:44:55,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13263 states to 13263 states and 18540 transitions. [2019-10-14 23:44:55,233 INFO L78 Accepts]: Start accepts. Automaton has 13263 states and 18540 transitions. Word has length 65 [2019-10-14 23:44:55,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:55,233 INFO L462 AbstractCegarLoop]: Abstraction has 13263 states and 18540 transitions. [2019-10-14 23:44:55,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:44:55,234 INFO L276 IsEmpty]: Start isEmpty. Operand 13263 states and 18540 transitions. [2019-10-14 23:44:55,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 23:44:55,238 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:55,238 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:55,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:44:55,442 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:55,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:55,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1883912516, now seen corresponding path program 1 times [2019-10-14 23:44:55,443 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:55,444 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672383819] [2019-10-14 23:44:55,444 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:55,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:55,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:55,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672383819] [2019-10-14 23:44:55,586 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:55,587 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:44:55,587 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752558648] [2019-10-14 23:44:55,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:44:55,590 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:55,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:44:55,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:44:55,591 INFO L87 Difference]: Start difference. First operand 13263 states and 18540 transitions. Second operand 4 states. [2019-10-14 23:44:56,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:56,783 INFO L93 Difference]: Finished difference Result 23665 states and 32961 transitions. [2019-10-14 23:44:56,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:44:56,783 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2019-10-14 23:44:56,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:56,810 INFO L225 Difference]: With dead ends: 23665 [2019-10-14 23:44:56,810 INFO L226 Difference]: Without dead ends: 14152 [2019-10-14 23:44:56,825 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:44:56,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14152 states. [2019-10-14 23:44:57,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14152 to 14133. [2019-10-14 23:44:57,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14133 states. [2019-10-14 23:44:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14133 states to 14133 states and 19350 transitions. [2019-10-14 23:44:57,701 INFO L78 Accepts]: Start accepts. Automaton has 14133 states and 19350 transitions. Word has length 66 [2019-10-14 23:44:57,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:57,701 INFO L462 AbstractCegarLoop]: Abstraction has 14133 states and 19350 transitions. [2019-10-14 23:44:57,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:44:57,701 INFO L276 IsEmpty]: Start isEmpty. Operand 14133 states and 19350 transitions. [2019-10-14 23:44:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 23:44:57,705 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:57,705 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:57,706 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:57,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:57,706 INFO L82 PathProgramCache]: Analyzing trace with hash -2075170094, now seen corresponding path program 1 times [2019-10-14 23:44:57,706 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:57,706 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723719890] [2019-10-14 23:44:57,707 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:57,707 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:57,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:58,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723719890] [2019-10-14 23:44:58,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162816499] [2019-10-14 23:44:58,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:44:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:58,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:44:58,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:44:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:44:58,238 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:44:58,238 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 13 [2019-10-14 23:44:58,238 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707190474] [2019-10-14 23:44:58,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:44:58,239 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:58,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:44:58,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:44:58,240 INFO L87 Difference]: Start difference. First operand 14133 states and 19350 transitions. Second operand 13 states. [2019-10-14 23:44:58,445 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 110