/usr/bin/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:33:34,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:33:34,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:33:34,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:33:34,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:33:34,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:33:34,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:33:34,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:33:34,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:33:34,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:33:34,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:33:34,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:33:34,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:33:34,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:33:34,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:33:34,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:33:34,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:33:34,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:33:35,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:33:35,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:33:35,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:33:35,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:33:35,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:33:35,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:33:35,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 00:33:35,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:33:35,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:33:35,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:33:35,032 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 [2019-11-07 00:33:35,068 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:33:35,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:33:35,070 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:33:35,070 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:33:35,070 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:33:35,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:33:35,071 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:33:35,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:33:35,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:33:35,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:33:35,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:33:35,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:33:35,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:33:35,074 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:33:35,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:33:35,074 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:33:35,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:33:35,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:33:35,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:33:35,075 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:33:35,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:33:35,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:33:35,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:33:35,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:33:35,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:33:35,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:33:35,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:33:35,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:33:35,077 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:33:35,354 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:33:35,374 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:33:35,377 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:33:35,379 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:33:35,380 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:33:35,381 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+nlh-reducer.c [2019-11-07 00:33:35,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb028d326/11b477c6abaf41b5bd1422132c90dc9e/FLAGa86ddb6bd [2019-11-07 00:33:36,038 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:33:36,038 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+nlh-reducer.c [2019-11-07 00:33:36,055 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb028d326/11b477c6abaf41b5bd1422132c90dc9e/FLAGa86ddb6bd [2019-11-07 00:33:36,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb028d326/11b477c6abaf41b5bd1422132c90dc9e [2019-11-07 00:33:36,300 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:33:36,302 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:33:36,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:33:36,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:33:36,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:33:36,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:33:36" (1/1) ... [2019-11-07 00:33:36,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dd2903e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:36, skipping insertion in model container [2019-11-07 00:33:36,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:33:36" (1/1) ... [2019-11-07 00:33:36,319 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:33:36,387 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:33:36,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:33:36,980 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:33:37,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:33:37,191 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:33:37,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:37 WrapperNode [2019-11-07 00:33:37,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:33:37,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:33:37,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:33:37,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:33:37,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:37" (1/1) ... [2019-11-07 00:33:37,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:37" (1/1) ... [2019-11-07 00:33:37,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:37" (1/1) ... [2019-11-07 00:33:37,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:37" (1/1) ... [2019-11-07 00:33:37,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:37" (1/1) ... [2019-11-07 00:33:37,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:37" (1/1) ... [2019-11-07 00:33:37,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:37" (1/1) ... [2019-11-07 00:33:37,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:33:37,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:33:37,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:33:37,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:33:37,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:37" (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 [2019-11-07 00:33:37,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:33:37,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:33:37,488 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:33:37,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:33:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2019-11-07 00:33:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2019-11-07 00:33:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:33:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 00:33:37,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:33:37,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:33:37,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:33:37,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:33:37,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:33:37,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:33:37,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:33:37,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:33:37,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:33:39,629 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:33:39,630 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-07 00:33:39,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:33:39 BoogieIcfgContainer [2019-11-07 00:33:39,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:33:39,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:33:39,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:33:39,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:33:39,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:33:36" (1/3) ... [2019-11-07 00:33:39,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26cc1b28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:33:39, skipping insertion in model container [2019-11-07 00:33:39,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:37" (2/3) ... [2019-11-07 00:33:39,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26cc1b28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:33:39, skipping insertion in model container [2019-11-07 00:33:39,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:33:39" (3/3) ... [2019-11-07 00:33:39,640 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+nlh-reducer.c [2019-11-07 00:33:39,650 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:33:39,659 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:33:39,671 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:33:39,699 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:33:39,699 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:33:39,699 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:33:39,699 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:33:39,699 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:33:39,699 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:33:39,700 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:33:39,700 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:33:39,721 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states. [2019-11-07 00:33:39,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-07 00:33:39,736 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:33:39,737 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:33:39,739 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:33:39,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:33:39,746 INFO L82 PathProgramCache]: Analyzing trace with hash -745324545, now seen corresponding path program 1 times [2019-11-07 00:33:39,755 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:33:39,755 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098129163] [2019-11-07 00:33:39,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:33:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:33:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:33:46,108 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098129163] [2019-11-07 00:33:46,109 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:33:46,109 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2019-11-07 00:33:46,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055222592] [2019-11-07 00:33:46,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-11-07 00:33:46,117 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:33:46,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-11-07 00:33:46,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=4400, Unknown=0, NotChecked=0, Total=4556 [2019-11-07 00:33:46,134 INFO L87 Difference]: Start difference. First operand 184 states. Second operand 68 states.