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/eca-rers2012/Problem15_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:04:36,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:04:36,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:04:36,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:04:36,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:04:36,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:04:36,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:04:36,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:04:36,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:04:36,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:04:36,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:04:36,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:04:36,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:04:36,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:04:36,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:04:36,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:04:36,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:04:36,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:04:36,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:04:36,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:04:36,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:04:36,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:04:36,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:04:36,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:04:36,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:04:36,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:04:36,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:04:36,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:04:36,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:04:36,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:04:36,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:04:36,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:04:36,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:04:36,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:04:36,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:04:36,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:04:36,678 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 18:04:36,699 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:04:36,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:04:36,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:04:36,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:04:36,702 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:04:36,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:04:36,703 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:04:36,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:04:36,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:04:36,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:04:36,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:04:36,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:04:36,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:04:36,705 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:04:36,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:04:36,705 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:04:36,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:04:36,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:04:36,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:04:36,706 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:04:36,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:04:36,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:04:36,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:04:36,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:04:36,707 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:04:36,707 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:04:36,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:04:36,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:04:36,708 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:04:36,998 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:04:37,011 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:04:37,014 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:04:37,016 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:04:37,016 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:04:37,017 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label54.c [2019-10-13 18:04:37,091 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/483d4e221/54a672b7288f448682947e1949f954c6/FLAGf23e1b501 [2019-10-13 18:04:37,745 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:04:37,745 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label54.c [2019-10-13 18:04:37,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/483d4e221/54a672b7288f448682947e1949f954c6/FLAGf23e1b501 [2019-10-13 18:04:37,895 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/483d4e221/54a672b7288f448682947e1949f954c6 [2019-10-13 18:04:37,904 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:04:37,905 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:04:37,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:04:37,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:04:37,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:04:37,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:04:37" (1/1) ... [2019-10-13 18:04:37,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ac730e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:37, skipping insertion in model container [2019-10-13 18:04:37,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:04:37" (1/1) ... [2019-10-13 18:04:37,924 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:04:38,013 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:04:38,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:04:38,800 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:04:39,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:04:39,087 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:04:39,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:39 WrapperNode [2019-10-13 18:04:39,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:04:39,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:04:39,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:04:39,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:04:39,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:39" (1/1) ... [2019-10-13 18:04:39,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:39" (1/1) ... [2019-10-13 18:04:39,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:39" (1/1) ... [2019-10-13 18:04:39,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:39" (1/1) ... [2019-10-13 18:04:39,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:39" (1/1) ... [2019-10-13 18:04:39,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:39" (1/1) ... [2019-10-13 18:04:39,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:39" (1/1) ... [2019-10-13 18:04:39,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:04:39,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:04:39,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:04:39,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:04:39,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:39" (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 18:04:39,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:04:39,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:04:39,346 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:04:39,347 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:04:39,347 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:04:39,348 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:04:39,348 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:04:39,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:04:39,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:04:39,348 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:04:39,349 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:04:39,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:04:39,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:04:43,658 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:04:43,659 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:04:43,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:43 BoogieIcfgContainer [2019-10-13 18:04:43,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:04:43,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:04:43,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:04:43,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:04:43,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:04:37" (1/3) ... [2019-10-13 18:04:43,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f420930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:43, skipping insertion in model container [2019-10-13 18:04:43,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:39" (2/3) ... [2019-10-13 18:04:43,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f420930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:43, skipping insertion in model container [2019-10-13 18:04:43,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:43" (3/3) ... [2019-10-13 18:04:43,677 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label54.c [2019-10-13 18:04:43,690 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:04:43,699 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:04:43,710 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:04:43,760 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:04:43,761 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:04:43,761 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:04:43,762 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:04:43,762 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:04:43,762 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:04:43,762 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:04:43,762 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:04:43,805 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-13 18:04:43,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 18:04:43,815 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:43,816 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:04:43,818 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:43,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:43,824 INFO L82 PathProgramCache]: Analyzing trace with hash 54256576, now seen corresponding path program 1 times [2019-10-13 18:04:43,835 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:43,835 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326283857] [2019-10-13 18:04:43,835 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:43,836 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:43,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:44,243 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 18:04:44,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326283857] [2019-10-13 18:04:44,245 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:44,245 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:04:44,246 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495688265] [2019-10-13 18:04:44,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:04:44,250 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:44,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:04:44,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:04:44,267 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-10-13 18:04:51,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:51,194 INFO L93 Difference]: Finished difference Result 1525 states and 2796 transitions. [2019-10-13 18:04:51,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:04:51,196 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2019-10-13 18:04:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:51,224 INFO L225 Difference]: With dead ends: 1525 [2019-10-13 18:04:51,225 INFO L226 Difference]: Without dead ends: 1020 [2019-10-13 18:04:51,237 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:04:51,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2019-10-13 18:04:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 1014. [2019-10-13 18:04:51,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1014 states. [2019-10-13 18:04:51,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1536 transitions. [2019-10-13 18:04:51,380 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1536 transitions. Word has length 46 [2019-10-13 18:04:51,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:51,381 INFO L462 AbstractCegarLoop]: Abstraction has 1014 states and 1536 transitions. [2019-10-13 18:04:51,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:04:51,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1536 transitions. [2019-10-13 18:04:51,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 18:04:51,391 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:51,391 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:51,392 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:51,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:51,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1513205916, now seen corresponding path program 1 times [2019-10-13 18:04:51,392 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:51,393 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060270017] [2019-10-13 18:04:51,393 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:51,393 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:51,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:51,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060270017] [2019-10-13 18:04:51,818 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:51,818 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 18:04:51,819 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33656105] [2019-10-13 18:04:51,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 18:04:51,821 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:51,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 18:04:51,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:04:51,822 INFO L87 Difference]: Start difference. First operand 1014 states and 1536 transitions. Second operand 7 states. [2019-10-13 18:04:57,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:57,379 INFO L93 Difference]: Finished difference Result 3014 states and 4633 transitions. [2019-10-13 18:04:57,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 18:04:57,379 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 162 [2019-10-13 18:04:57,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:57,397 INFO L225 Difference]: With dead ends: 3014 [2019-10-13 18:04:57,397 INFO L226 Difference]: Without dead ends: 2006 [2019-10-13 18:04:57,402 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:04:57,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2019-10-13 18:04:57,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1970. [2019-10-13 18:04:57,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1970 states. [2019-10-13 18:04:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 2632 transitions. [2019-10-13 18:04:57,492 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 2632 transitions. Word has length 162 [2019-10-13 18:04:57,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:57,493 INFO L462 AbstractCegarLoop]: Abstraction has 1970 states and 2632 transitions. [2019-10-13 18:04:57,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 18:04:57,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 2632 transitions. [2019-10-13 18:04:57,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2019-10-13 18:04:57,504 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:57,504 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:57,505 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:57,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:57,505 INFO L82 PathProgramCache]: Analyzing trace with hash 899976135, now seen corresponding path program 1 times [2019-10-13 18:04:57,506 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:57,506 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862518921] [2019-10-13 18:04:57,506 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:57,506 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:57,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 138 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:04:58,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862518921] [2019-10-13 18:04:58,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051892947] [2019-10-13 18:04:58,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:58,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 18:04:58,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:59,060 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:04:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-13 18:04:59,363 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:04:59,375 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2019-10-13 18:04:59,375 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780726034] [2019-10-13 18:04:59,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:04:59,380 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:59,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:04:59,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:04:59,383 INFO L87 Difference]: Start difference. First operand 1970 states and 2632 transitions. Second operand 5 states. [2019-10-13 18:05:02,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:02,949 INFO L93 Difference]: Finished difference Result 4290 states and 5667 transitions. [2019-10-13 18:05:02,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:05:02,951 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2019-10-13 18:05:02,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:02,968 INFO L225 Difference]: With dead ends: 4290 [2019-10-13 18:05:02,969 INFO L226 Difference]: Without dead ends: 2326 [2019-10-13 18:05:02,974 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 330 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:05:02,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2019-10-13 18:05:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 2294. [2019-10-13 18:05:03,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2294 states. [2019-10-13 18:05:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 2971 transitions. [2019-10-13 18:05:03,043 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 2971 transitions. Word has length 326 [2019-10-13 18:05:03,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:03,044 INFO L462 AbstractCegarLoop]: Abstraction has 2294 states and 2971 transitions. [2019-10-13 18:05:03,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:03,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 2971 transitions. [2019-10-13 18:05:03,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2019-10-13 18:05:03,052 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:03,052 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:03,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:03,257 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:03,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:03,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1774073790, now seen corresponding path program 1 times [2019-10-13 18:05:03,259 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:03,259 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640119858] [2019-10-13 18:05:03,260 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:03,260 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:03,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 18:05:03,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640119858] [2019-10-13 18:05:03,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584603750] [2019-10-13 18:05:03,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:03,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:03,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:04,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:05:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 156 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:04,167 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:04,168 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-10-13 18:05:04,168 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331991280] [2019-10-13 18:05:04,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 18:05:04,170 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:04,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 18:05:04,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 18:05:04,170 INFO L87 Difference]: Start difference. First operand 2294 states and 2971 transitions. Second operand 10 states.