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_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:46:02,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:46:02,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:46:02,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:46:02,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:46:02,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:46:02,725 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:46:02,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:46:02,728 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:46:02,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:46:02,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:46:02,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:46:02,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:46:02,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:46:02,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:46:02,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:46:02,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:46:02,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:46:02,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:46:02,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:46:02,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:46:02,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:46:02,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:46:02,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:46:02,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:46:02,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:46:02,751 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:46:02,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:46:02,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:46:02,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:46:02,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:46:02,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:46:02,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:46:02,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:46:02,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:46:02,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:46:02,757 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 19:46:02,771 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:46:02,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:46:02,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:46:02,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:46:02,774 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:46:02,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:46:02,775 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:46:02,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:46:02,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:46:02,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:46:02,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:46:02,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:46:02,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:46:02,776 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:46:02,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:46:02,777 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:46:02,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:46:02,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:46:02,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:46:02,777 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:46:02,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:46:02,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:46:02,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:46:02,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:46:02,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:46:02,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:46:02,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:46:02,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:46:02,780 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:46:03,057 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:46:03,077 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:46:03,082 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:46:03,084 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:46:03,084 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:46:03,085 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2019-10-13 19:46:03,154 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/371bdf448/9a5a79a9ae4a4d658d8f953926a90c74/FLAGcd95739fe [2019-10-13 19:46:03,778 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:46:03,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2019-10-13 19:46:03,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/371bdf448/9a5a79a9ae4a4d658d8f953926a90c74/FLAGcd95739fe [2019-10-13 19:46:03,966 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/371bdf448/9a5a79a9ae4a4d658d8f953926a90c74 [2019-10-13 19:46:03,976 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:46:03,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:46:03,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:46:03,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:46:03,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:46:03,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:46:03" (1/1) ... [2019-10-13 19:46:03,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16df3184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:03, skipping insertion in model container [2019-10-13 19:46:03,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:46:03" (1/1) ... [2019-10-13 19:46:03,995 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:46:04,073 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:46:04,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:46:04,789 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:46:05,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:46:05,238 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:46:05,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:05 WrapperNode [2019-10-13 19:46:05,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:46:05,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:46:05,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:46:05,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:46:05,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:05" (1/1) ... [2019-10-13 19:46:05,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:05" (1/1) ... [2019-10-13 19:46:05,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:05" (1/1) ... [2019-10-13 19:46:05,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:05" (1/1) ... [2019-10-13 19:46:05,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:05" (1/1) ... [2019-10-13 19:46:05,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:05" (1/1) ... [2019-10-13 19:46:05,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:05" (1/1) ... [2019-10-13 19:46:05,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:46:05,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:46:05,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:46:05,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:46:05,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:05" (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 19:46:05,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:46:05,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:46:05,473 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:46:05,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:46:05,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-13 19:46:05,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-10-13 19:46:05,474 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-10-13 19:46:05,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:46:05,475 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-10-13 19:46:05,475 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-10-13 19:46:05,475 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-10-13 19:46:05,475 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-10-13 19:46:05,475 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-10-13 19:46:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-10-13 19:46:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-10-13 19:46:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:46:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:46:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:46:07,279 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:46:07,279 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-13 19:46:07,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:46:07 BoogieIcfgContainer [2019-10-13 19:46:07,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:46:07,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:46:07,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:46:07,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:46:07,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:46:03" (1/3) ... [2019-10-13 19:46:07,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee654e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:46:07, skipping insertion in model container [2019-10-13 19:46:07,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:46:05" (2/3) ... [2019-10-13 19:46:07,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee654e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:46:07, skipping insertion in model container [2019-10-13 19:46:07,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:46:07" (3/3) ... [2019-10-13 19:46:07,292 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2019-10-13 19:46:07,306 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:46:07,329 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-10-13 19:46:07,344 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-10-13 19:46:07,394 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:46:07,394 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:46:07,395 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:46:07,395 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:46:07,395 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:46:07,395 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:46:07,395 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:46:07,396 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:46:07,442 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states. [2019-10-13 19:46:07,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 19:46:07,476 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:07,478 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:46:07,481 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:07,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:07,489 INFO L82 PathProgramCache]: Analyzing trace with hash 42890573, now seen corresponding path program 1 times [2019-10-13 19:46:07,498 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:07,498 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11134559] [2019-10-13 19:46:07,499 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:07,499 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:07,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:08,775 WARN L191 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2019-10-13 19:46:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:08,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11134559] [2019-10-13 19:46:08,871 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:08,871 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:46:08,872 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713467823] [2019-10-13 19:46:08,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:46:08,879 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:08,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:46:08,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:46:08,897 INFO L87 Difference]: Start difference. First operand 418 states. Second operand 5 states. [2019-10-13 19:46:12,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:12,873 INFO L93 Difference]: Finished difference Result 1212 states and 2155 transitions. [2019-10-13 19:46:12,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:46:12,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2019-10-13 19:46:12,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:12,899 INFO L225 Difference]: With dead ends: 1212 [2019-10-13 19:46:12,899 INFO L226 Difference]: Without dead ends: 799 [2019-10-13 19:46:12,906 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:46:12,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2019-10-13 19:46:13,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 773. [2019-10-13 19:46:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 773 states. [2019-10-13 19:46:13,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1109 transitions. [2019-10-13 19:46:13,052 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1109 transitions. Word has length 152 [2019-10-13 19:46:13,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:13,054 INFO L462 AbstractCegarLoop]: Abstraction has 773 states and 1109 transitions. [2019-10-13 19:46:13,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:46:13,055 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1109 transitions. [2019-10-13 19:46:13,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 19:46:13,062 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:13,062 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:46:13,063 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:13,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:13,064 INFO L82 PathProgramCache]: Analyzing trace with hash -832663523, now seen corresponding path program 1 times [2019-10-13 19:46:13,065 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:13,065 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319480171] [2019-10-13 19:46:13,065 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:13,065 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:13,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:13,448 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2019-10-13 19:46:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:13,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319480171] [2019-10-13 19:46:13,517 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:13,517 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:46:13,518 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315837454] [2019-10-13 19:46:13,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:46:13,521 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:13,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:46:13,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:13,522 INFO L87 Difference]: Start difference. First operand 773 states and 1109 transitions. Second operand 4 states. [2019-10-13 19:46:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:15,758 INFO L93 Difference]: Finished difference Result 2273 states and 3257 transitions. [2019-10-13 19:46:15,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:46:15,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2019-10-13 19:46:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:15,768 INFO L225 Difference]: With dead ends: 2273 [2019-10-13 19:46:15,768 INFO L226 Difference]: Without dead ends: 1532 [2019-10-13 19:46:15,772 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:15,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2019-10-13 19:46:15,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 775. [2019-10-13 19:46:15,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2019-10-13 19:46:15,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1111 transitions. [2019-10-13 19:46:15,818 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1111 transitions. Word has length 153 [2019-10-13 19:46:15,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:15,818 INFO L462 AbstractCegarLoop]: Abstraction has 775 states and 1111 transitions. [2019-10-13 19:46:15,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:46:15,819 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1111 transitions. [2019-10-13 19:46:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 19:46:15,822 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:15,822 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:46:15,822 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:15,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:15,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1878298894, now seen corresponding path program 1 times [2019-10-13 19:46:15,823 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:15,823 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036590402] [2019-10-13 19:46:15,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:15,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:15,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:16,504 WARN L191 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2019-10-13 19:46:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:16,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036590402] [2019-10-13 19:46:16,583 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:16,584 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:46:16,584 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455001590] [2019-10-13 19:46:16,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:46:16,594 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:16,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:46:16,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:46:16,595 INFO L87 Difference]: Start difference. First operand 775 states and 1111 transitions. Second operand 5 states. [2019-10-13 19:46:18,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:18,318 INFO L93 Difference]: Finished difference Result 1532 states and 2197 transitions. [2019-10-13 19:46:18,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:46:18,318 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2019-10-13 19:46:18,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:18,323 INFO L225 Difference]: With dead ends: 1532 [2019-10-13 19:46:18,323 INFO L226 Difference]: Without dead ends: 775 [2019-10-13 19:46:18,325 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:46:18,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2019-10-13 19:46:18,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 774. [2019-10-13 19:46:18,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 774 states. [2019-10-13 19:46:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1108 transitions. [2019-10-13 19:46:18,354 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1108 transitions. Word has length 154 [2019-10-13 19:46:18,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:18,355 INFO L462 AbstractCegarLoop]: Abstraction has 774 states and 1108 transitions. [2019-10-13 19:46:18,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:46:18,355 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1108 transitions. [2019-10-13 19:46:18,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 19:46:18,357 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:18,358 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:46:18,358 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:18,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:18,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1636071890, now seen corresponding path program 1 times [2019-10-13 19:46:18,359 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:18,359 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752691918] [2019-10-13 19:46:18,359 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:18,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:18,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:18,894 WARN L191 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2019-10-13 19:46:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:18,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752691918] [2019-10-13 19:46:18,963 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:18,964 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:46:18,964 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228506529] [2019-10-13 19:46:18,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:46:18,965 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:18,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:46:18,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:46:18,968 INFO L87 Difference]: Start difference. First operand 774 states and 1108 transitions. Second operand 5 states. [2019-10-13 19:46:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:20,793 INFO L93 Difference]: Finished difference Result 1535 states and 2199 transitions. [2019-10-13 19:46:20,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:46:20,794 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2019-10-13 19:46:20,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:20,799 INFO L225 Difference]: With dead ends: 1535 [2019-10-13 19:46:20,799 INFO L226 Difference]: Without dead ends: 772 [2019-10-13 19:46:20,801 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:46:20,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2019-10-13 19:46:20,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 772. [2019-10-13 19:46:20,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2019-10-13 19:46:20,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1104 transitions. [2019-10-13 19:46:20,830 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1104 transitions. Word has length 154 [2019-10-13 19:46:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:20,830 INFO L462 AbstractCegarLoop]: Abstraction has 772 states and 1104 transitions. [2019-10-13 19:46:20,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:46:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1104 transitions. [2019-10-13 19:46:20,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 19:46:20,833 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:20,833 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:46:20,834 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:20,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:20,834 INFO L82 PathProgramCache]: Analyzing trace with hash -674126987, now seen corresponding path program 1 times [2019-10-13 19:46:20,834 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:20,835 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589506213] [2019-10-13 19:46:20,835 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:20,835 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:20,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:21,279 WARN L191 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2019-10-13 19:46:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:21,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589506213] [2019-10-13 19:46:21,331 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:21,331 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:46:21,332 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742548814] [2019-10-13 19:46:21,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:46:21,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:21,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:46:21,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:21,333 INFO L87 Difference]: Start difference. First operand 772 states and 1104 transitions. Second operand 4 states. [2019-10-13 19:46:24,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:24,446 INFO L93 Difference]: Finished difference Result 1732 states and 2480 transitions. [2019-10-13 19:46:24,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:46:24,447 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-10-13 19:46:24,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:24,454 INFO L225 Difference]: With dead ends: 1732 [2019-10-13 19:46:24,454 INFO L226 Difference]: Without dead ends: 1156 [2019-10-13 19:46:24,455 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2019-10-13 19:46:24,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1130. [2019-10-13 19:46:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1130 states. [2019-10-13 19:46:24,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1602 transitions. [2019-10-13 19:46:24,497 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1602 transitions. Word has length 154 [2019-10-13 19:46:24,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:24,498 INFO L462 AbstractCegarLoop]: Abstraction has 1130 states and 1602 transitions. [2019-10-13 19:46:24,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:46:24,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1602 transitions. [2019-10-13 19:46:24,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 19:46:24,501 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:24,501 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:46:24,502 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:24,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:24,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1140766677, now seen corresponding path program 1 times [2019-10-13 19:46:24,502 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:24,503 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092228045] [2019-10-13 19:46:24,503 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:24,503 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:24,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:24,805 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2019-10-13 19:46:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:24,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092228045] [2019-10-13 19:46:24,871 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:24,871 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:46:24,872 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537960713] [2019-10-13 19:46:24,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:46:24,876 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:24,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:46:24,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:24,877 INFO L87 Difference]: Start difference. First operand 1130 states and 1602 transitions. Second operand 4 states. [2019-10-13 19:46:27,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:27,010 INFO L93 Difference]: Finished difference Result 2442 states and 3547 transitions. [2019-10-13 19:46:27,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:46:27,011 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2019-10-13 19:46:27,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:27,019 INFO L225 Difference]: With dead ends: 2442 [2019-10-13 19:46:27,019 INFO L226 Difference]: Without dead ends: 1501 [2019-10-13 19:46:27,021 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:27,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2019-10-13 19:46:27,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1342. [2019-10-13 19:46:27,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1342 states. [2019-10-13 19:46:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1945 transitions. [2019-10-13 19:46:27,073 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1945 transitions. Word has length 156 [2019-10-13 19:46:27,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:27,074 INFO L462 AbstractCegarLoop]: Abstraction has 1342 states and 1945 transitions. [2019-10-13 19:46:27,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:46:27,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1945 transitions. [2019-10-13 19:46:27,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-13 19:46:27,077 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:27,077 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:46:27,078 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:27,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:27,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1542236816, now seen corresponding path program 1 times [2019-10-13 19:46:27,079 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:27,079 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034942232] [2019-10-13 19:46:27,079 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:27,079 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:27,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:27,457 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2019-10-13 19:46:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:27,496 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034942232] [2019-10-13 19:46:27,496 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:27,497 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:46:27,497 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162384704] [2019-10-13 19:46:27,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:46:27,498 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:27,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:46:27,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:27,498 INFO L87 Difference]: Start difference. First operand 1342 states and 1945 transitions. Second operand 4 states. [2019-10-13 19:46:29,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:29,818 INFO L93 Difference]: Finished difference Result 2987 states and 4450 transitions. [2019-10-13 19:46:29,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:46:29,819 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2019-10-13 19:46:29,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:29,829 INFO L225 Difference]: With dead ends: 2987 [2019-10-13 19:46:29,829 INFO L226 Difference]: Without dead ends: 1918 [2019-10-13 19:46:29,832 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:29,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2019-10-13 19:46:29,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1719. [2019-10-13 19:46:29,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1719 states. [2019-10-13 19:46:29,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2553 transitions. [2019-10-13 19:46:29,907 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2553 transitions. Word has length 158 [2019-10-13 19:46:29,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:29,907 INFO L462 AbstractCegarLoop]: Abstraction has 1719 states and 2553 transitions. [2019-10-13 19:46:29,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:46:29,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2553 transitions. [2019-10-13 19:46:29,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-13 19:46:29,911 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:29,911 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:46:29,911 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:29,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1399172685, now seen corresponding path program 1 times [2019-10-13 19:46:29,912 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:29,912 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927244313] [2019-10-13 19:46:29,912 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:29,913 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:29,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:30,351 WARN L191 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2019-10-13 19:46:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:30,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927244313] [2019-10-13 19:46:30,403 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:30,403 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:46:30,403 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615809007] [2019-10-13 19:46:30,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:46:30,404 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:30,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:46:30,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:46:30,405 INFO L87 Difference]: Start difference. First operand 1719 states and 2553 transitions. Second operand 6 states. [2019-10-13 19:46:30,735 WARN L191 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2019-10-13 19:46:32,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:32,591 INFO L93 Difference]: Finished difference Result 4371 states and 6633 transitions. [2019-10-13 19:46:32,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:46:32,591 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2019-10-13 19:46:32,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:32,604 INFO L225 Difference]: With dead ends: 4371 [2019-10-13 19:46:32,604 INFO L226 Difference]: Without dead ends: 2835 [2019-10-13 19:46:32,608 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:46:32,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2019-10-13 19:46:32,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2833. [2019-10-13 19:46:32,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2019-10-13 19:46:32,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 4278 transitions. [2019-10-13 19:46:32,752 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 4278 transitions. Word has length 159 [2019-10-13 19:46:32,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:32,753 INFO L462 AbstractCegarLoop]: Abstraction has 2833 states and 4278 transitions. [2019-10-13 19:46:32,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:46:32,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 4278 transitions. [2019-10-13 19:46:32,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-13 19:46:32,758 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:32,758 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:46:32,759 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:32,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:32,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1519156504, now seen corresponding path program 1 times [2019-10-13 19:46:32,759 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:32,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279754446] [2019-10-13 19:46:32,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:32,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:32,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:33,302 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2019-10-13 19:46:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:33,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279754446] [2019-10-13 19:46:33,379 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:33,380 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:46:33,380 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897648395] [2019-10-13 19:46:33,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:46:33,380 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:33,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:46:33,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:46:33,381 INFO L87 Difference]: Start difference. First operand 2833 states and 4278 transitions. Second operand 5 states. [2019-10-13 19:46:36,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:36,559 INFO L93 Difference]: Finished difference Result 7338 states and 11090 transitions. [2019-10-13 19:46:36,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:46:36,559 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2019-10-13 19:46:36,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:36,573 INFO L225 Difference]: With dead ends: 7338 [2019-10-13 19:46:36,573 INFO L226 Difference]: Without dead ends: 4536 [2019-10-13 19:46:36,578 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:46:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2019-10-13 19:46:36,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 4513. [2019-10-13 19:46:36,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4513 states. [2019-10-13 19:46:36,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4513 states to 4513 states and 6769 transitions. [2019-10-13 19:46:36,825 INFO L78 Accepts]: Start accepts. Automaton has 4513 states and 6769 transitions. Word has length 159 [2019-10-13 19:46:36,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:36,826 INFO L462 AbstractCegarLoop]: Abstraction has 4513 states and 6769 transitions. [2019-10-13 19:46:36,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:46:36,826 INFO L276 IsEmpty]: Start isEmpty. Operand 4513 states and 6769 transitions. [2019-10-13 19:46:36,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 19:46:36,834 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:36,834 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:46:36,835 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:36,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:36,836 INFO L82 PathProgramCache]: Analyzing trace with hash 779025742, now seen corresponding path program 1 times [2019-10-13 19:46:36,836 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:36,836 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030579328] [2019-10-13 19:46:36,836 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:36,837 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:36,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:37,193 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2019-10-13 19:46:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:37,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030579328] [2019-10-13 19:46:37,242 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:37,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:46:37,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601797953] [2019-10-13 19:46:37,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:46:37,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:37,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:46:37,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:37,244 INFO L87 Difference]: Start difference. First operand 4513 states and 6769 transitions. Second operand 4 states. [2019-10-13 19:46:39,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:39,509 INFO L93 Difference]: Finished difference Result 11128 states and 16749 transitions. [2019-10-13 19:46:39,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:46:39,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2019-10-13 19:46:39,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:39,532 INFO L225 Difference]: With dead ends: 11128 [2019-10-13 19:46:39,532 INFO L226 Difference]: Without dead ends: 6987 [2019-10-13 19:46:39,541 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:39,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6987 states. [2019-10-13 19:46:39,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6987 to 6966. [2019-10-13 19:46:39,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6966 states. [2019-10-13 19:46:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6966 states to 6966 states and 10335 transitions. [2019-10-13 19:46:39,859 INFO L78 Accepts]: Start accepts. Automaton has 6966 states and 10335 transitions. Word has length 161 [2019-10-13 19:46:39,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:39,859 INFO L462 AbstractCegarLoop]: Abstraction has 6966 states and 10335 transitions. [2019-10-13 19:46:39,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:46:39,859 INFO L276 IsEmpty]: Start isEmpty. Operand 6966 states and 10335 transitions. [2019-10-13 19:46:39,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-13 19:46:39,866 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:39,866 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:46:39,867 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:39,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:39,867 INFO L82 PathProgramCache]: Analyzing trace with hash -169339511, now seen corresponding path program 1 times [2019-10-13 19:46:39,867 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:39,867 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069427419] [2019-10-13 19:46:39,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:39,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:39,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:40,243 WARN L191 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2019-10-13 19:46:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:40,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:40,281 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069427419] [2019-10-13 19:46:40,281 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:40,282 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:46:40,282 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668289838] [2019-10-13 19:46:40,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:46:40,282 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:40,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:46:40,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:46:40,283 INFO L87 Difference]: Start difference. First operand 6966 states and 10335 transitions. Second operand 4 states.