/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:02:42,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:02:42,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:02:42,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:02:42,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:02:42,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:02:42,922 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:02:42,924 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:02:42,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:02:42,928 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:02:42,929 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:02:42,931 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:02:42,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:02:42,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:02:42,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:02:42,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:02:42,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:02:42,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:02:42,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:02:42,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:02:42,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:02:42,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:02:42,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:02:42,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:02:43,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:02:43,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:02:43,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:02:43,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:02:43,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:02:43,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:02:43,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:02:43,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:02:43,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:02:43,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:02:43,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:02:43,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:02:43,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:02:43,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:02:43,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:02:43,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:02:43,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:02:43,043 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 23:02:43,098 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:02:43,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:02:43,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:02:43,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:02:43,103 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:02:43,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:02:43,103 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:02:43,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:02:43,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:02:43,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:02:43,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:02:43,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:02:43,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:02:43,106 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:02:43,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:02:43,106 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:02:43,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:02:43,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:02:43,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:02:43,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:02:43,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:02:43,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:02:43,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:02:43,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:02:43,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:02:43,109 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:02:43,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:02:43,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:02:43,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:02:43,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:02:43,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:02:43,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:02:43,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:02:43,577 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:02:43,577 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:02:43,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label01.c [2020-10-26 23:02:43,660 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd1b458cc/be9099245a124f54b512ae98f5107077/FLAGd8aaaf622 [2020-10-26 23:02:44,678 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:02:44,679 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label01.c [2020-10-26 23:02:44,739 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd1b458cc/be9099245a124f54b512ae98f5107077/FLAGd8aaaf622 [2020-10-26 23:02:45,096 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd1b458cc/be9099245a124f54b512ae98f5107077 [2020-10-26 23:02:45,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:02:45,108 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:02:45,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:02:45,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:02:45,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:02:45,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:02:45" (1/1) ... [2020-10-26 23:02:45,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@606cba56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:45, skipping insertion in model container [2020-10-26 23:02:45,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:02:45" (1/1) ... [2020-10-26 23:02:45,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:02:45,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:02:46,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:02:47,038 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:02:47,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:02:47,968 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:02:47,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:47 WrapperNode [2020-10-26 23:02:47,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:02:47,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:02:47,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:02:47,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:02:47,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:47" (1/1) ... [2020-10-26 23:02:47,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:47" (1/1) ... [2020-10-26 23:02:48,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:47" (1/1) ... [2020-10-26 23:02:48,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:47" (1/1) ... [2020-10-26 23:02:48,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:47" (1/1) ... [2020-10-26 23:02:48,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:47" (1/1) ... [2020-10-26 23:02:48,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:47" (1/1) ... [2020-10-26 23:02:48,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:02:48,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:02:48,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:02:48,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:02:48,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-26 23:02:48,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:02:48,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:02:48,681 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:02:48,682 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:02:48,682 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:02:48,682 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:02:48,682 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:02:48,683 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:02:48,683 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:02:48,683 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:02:48,684 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:02:48,684 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:02:48,684 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:02:48,684 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:02:48,684 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:02:48,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:02:48,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:02:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:02:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:02:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:02:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:02:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:02:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:02:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:02:48,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:02:58,465 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:02:58,465 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:02:58,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:02:58 BoogieIcfgContainer [2020-10-26 23:02:58,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:02:58,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:02:58,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:02:58,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:02:58,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:02:45" (1/3) ... [2020-10-26 23:02:58,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ab19e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:02:58, skipping insertion in model container [2020-10-26 23:02:58,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:02:47" (2/3) ... [2020-10-26 23:02:58,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ab19e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:02:58, skipping insertion in model container [2020-10-26 23:02:58,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:02:58" (3/3) ... [2020-10-26 23:02:58,479 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label01.c [2020-10-26 23:02:58,491 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:02:58,497 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:02:58,511 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:02:58,546 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:02:58,546 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:02:58,546 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:02:58,546 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:02:58,546 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:02:58,546 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:02:58,546 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:02:58,547 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:02:58,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:02:58,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 23:02:58,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:02:58,594 INFO L422 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] [2020-10-26 23:02:58,594 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:02:58,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:02:58,601 INFO L82 PathProgramCache]: Analyzing trace with hash 607207682, now seen corresponding path program 1 times [2020-10-26 23:02:58,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:02:58,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392606079] [2020-10-26 23:02:58,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:02:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:02:58,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:02:59,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:02:59,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 23:02:59,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:02:59,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 736 [2020-10-26 23:02:59,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:02:59,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:02:59,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:02:59,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-26 23:02:59,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:02:59,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:02:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:02:59,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:02:59,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:02:59,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:02:59,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:02:59,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 23:02:59,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:02:59,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:02:59,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:02:59,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:02:59,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:02:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:02:59,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392606079] [2020-10-26 23:02:59,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:02:59,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:02:59,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575368966] [2020-10-26 23:02:59,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:02:59,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:02:59,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:02:59,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:02:59,890 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:03:23,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:03:23,614 INFO L93 Difference]: Finished difference Result 3235 states and 5915 transitions. [2020-10-26 23:03:23,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:03:23,618 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-26 23:03:23,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:03:23,659 INFO L225 Difference]: With dead ends: 3235 [2020-10-26 23:03:23,660 INFO L226 Difference]: Without dead ends: 2027 [2020-10-26 23:03:23,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:03:23,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2020-10-26 23:03:23,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 2010. [2020-10-26 23:03:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2010 states. [2020-10-26 23:03:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3292 transitions. [2020-10-26 23:03:23,889 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3292 transitions. Word has length 56 [2020-10-26 23:03:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:03:23,890 INFO L481 AbstractCegarLoop]: Abstraction has 2010 states and 3292 transitions. [2020-10-26 23:03:23,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:03:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3292 transitions. [2020-10-26 23:03:23,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-26 23:03:23,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:03:23,896 INFO L422 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, 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] [2020-10-26 23:03:23,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:03:23,897 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:03:23,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:03:23,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1280228262, now seen corresponding path program 1 times [2020-10-26 23:03:23,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:03:23,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396164766] [2020-10-26 23:03:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:03:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:23,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:24,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:25,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:26,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:26,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-26 23:03:26,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:03:26,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2546 [2020-10-26 23:03:26,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:26,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:03:26,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:03:26,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:03:26,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:03:26,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:03:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:26,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:26,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:26,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:03:26,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:03:26,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 23:03:26,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:26,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:03:26,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:03:26,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:03:26,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-26 23:03:26,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:03:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:26,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:26,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:03:26,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:03:26,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:03:26,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-26 23:03:26,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:03:26,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:03:26,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:03:26,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:03:26,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:03:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:03:27,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396164766] [2020-10-26 23:03:27,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:03:27,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:03:27,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818874154] [2020-10-26 23:03:27,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:03:27,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:03:27,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:03:27,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:03:27,021 INFO L87 Difference]: Start difference. First operand 2010 states and 3292 transitions. Second operand 7 states. [2020-10-26 23:03:58,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:03:58,658 INFO L93 Difference]: Finished difference Result 5864 states and 9702 transitions. [2020-10-26 23:03:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:03:58,660 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2020-10-26 23:03:58,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:03:58,688 INFO L225 Difference]: With dead ends: 5864 [2020-10-26 23:03:58,688 INFO L226 Difference]: Without dead ends: 3860 [2020-10-26 23:03:58,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:03:58,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2020-10-26 23:03:58,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 3762. [2020-10-26 23:03:58,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3762 states. [2020-10-26 23:03:58,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3762 states to 3762 states and 5632 transitions. [2020-10-26 23:03:58,840 INFO L78 Accepts]: Start accepts. Automaton has 3762 states and 5632 transitions. Word has length 131 [2020-10-26 23:03:58,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:03:58,842 INFO L481 AbstractCegarLoop]: Abstraction has 3762 states and 5632 transitions. [2020-10-26 23:03:58,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:03:58,842 INFO L276 IsEmpty]: Start isEmpty. Operand 3762 states and 5632 transitions. [2020-10-26 23:03:58,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-26 23:03:58,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:03:58,856 INFO L422 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, 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] [2020-10-26 23:03:58,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:03:58,856 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:03:58,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:03:58,857 INFO L82 PathProgramCache]: Analyzing trace with hash 966113054, now seen corresponding path program 1 times [2020-10-26 23:03:58,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:03:58,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428292651] [2020-10-26 23:03:58,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:03:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:03:58,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:03:59,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:00,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:00,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-26 23:04:00,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:04:00,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1274 [2020-10-26 23:04:00,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:00,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:04:00,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:04:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:04:00,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:00,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:04:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:00,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:00,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:00,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:04:00,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:00,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 23:04:00,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:00,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:04:00,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:04:00,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:04:00,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:00,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:04:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:00,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:00,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:00,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 23:04:00,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:00,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-26 23:04:00,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:00,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:04:00,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:04:00,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:04:00,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:04:00,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428292651] [2020-10-26 23:04:00,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:04:00,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:04:00,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893072073] [2020-10-26 23:04:00,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:04:00,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:04:00,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:04:00,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:04:00,734 INFO L87 Difference]: Start difference. First operand 3762 states and 5632 transitions. Second operand 7 states. [2020-10-26 23:04:02,610 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:04:28,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:04:28,923 INFO L93 Difference]: Finished difference Result 11050 states and 16899 transitions. [2020-10-26 23:04:28,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:04:28,924 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 145 [2020-10-26 23:04:28,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:04:28,968 INFO L225 Difference]: With dead ends: 11050 [2020-10-26 23:04:28,969 INFO L226 Difference]: Without dead ends: 7294 [2020-10-26 23:04:28,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:04:28,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7294 states. [2020-10-26 23:04:29,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7294 to 7231. [2020-10-26 23:04:29,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7231 states. [2020-10-26 23:04:29,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7231 states to 7231 states and 10473 transitions. [2020-10-26 23:04:29,225 INFO L78 Accepts]: Start accepts. Automaton has 7231 states and 10473 transitions. Word has length 145 [2020-10-26 23:04:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:04:29,228 INFO L481 AbstractCegarLoop]: Abstraction has 7231 states and 10473 transitions. [2020-10-26 23:04:29,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:04:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 7231 states and 10473 transitions. [2020-10-26 23:04:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-26 23:04:29,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:04:29,240 INFO L422 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, 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] [2020-10-26 23:04:29,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:04:29,241 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:04:29,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:04:29,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1456242186, now seen corresponding path program 1 times [2020-10-26 23:04:29,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:04:29,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357081040] [2020-10-26 23:04:29,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:04:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:29,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:29,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:31,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:31,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-26 23:04:31,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:04:31,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1723 [2020-10-26 23:04:31,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:31,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:04:31,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:04:31,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-26 23:04:31,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:31,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:04:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:31,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:31,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:31,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:04:31,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:31,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:04:31,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:31,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:04:31,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:04:31,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:04:31,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:31,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:04:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:31,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:31,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:31,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 23:04:31,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:31,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-26 23:04:31,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:04:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:04:31,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 23:04:31,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:04:31,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357081040] [2020-10-26 23:04:31,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:04:31,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:04:31,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971415304] [2020-10-26 23:04:31,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:04:31,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:04:31,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:04:31,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:04:31,889 INFO L87 Difference]: Start difference. First operand 7231 states and 10473 transitions. Second operand 7 states. [2020-10-26 23:04:32,056 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 23:04:33,807 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-26 23:04:58,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:04:58,202 INFO L93 Difference]: Finished difference Result 15644 states and 22588 transitions. [2020-10-26 23:04:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:04:58,204 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 171 [2020-10-26 23:04:58,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:04:58,247 INFO L225 Difference]: With dead ends: 15644 [2020-10-26 23:04:58,248 INFO L226 Difference]: Without dead ends: 8419 [2020-10-26 23:04:58,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:04:58,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8419 states. [2020-10-26 23:04:58,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8419 to 8140. [2020-10-26 23:04:58,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8140 states. [2020-10-26 23:04:58,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8140 states to 8140 states and 11513 transitions. [2020-10-26 23:04:58,536 INFO L78 Accepts]: Start accepts. Automaton has 8140 states and 11513 transitions. Word has length 171 [2020-10-26 23:04:58,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:04:58,536 INFO L481 AbstractCegarLoop]: Abstraction has 8140 states and 11513 transitions. [2020-10-26 23:04:58,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:04:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 8140 states and 11513 transitions. [2020-10-26 23:04:58,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-26 23:04:58,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:04:58,541 INFO L422 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, 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] [2020-10-26 23:04:58,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:04:58,541 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:04:58,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:04:58,542 INFO L82 PathProgramCache]: Analyzing trace with hash -57367577, now seen corresponding path program 1 times [2020-10-26 23:04:58,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:04:58,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103932908] [2020-10-26 23:04:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:04:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:58,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:58,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:58,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-26 23:04:58,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:58,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-26 23:04:58,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:58,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:04:58,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-26 23:04:58,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 23:04:58,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:59,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:04:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:59,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:59,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:59,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:04:59,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:59,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:04:59,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:59,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:04:59,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:04:59,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:04:59,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:59,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:04:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:04:59,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:04:59,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:04:59,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:04:59,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:04:59,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-26 23:04:59,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:04:59,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:04:59,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:04:59,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 23:04:59,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:04:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:04:59,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103932908] [2020-10-26 23:04:59,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:04:59,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:04:59,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816017563] [2020-10-26 23:04:59,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:04:59,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:04:59,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:04:59,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:04:59,585 INFO L87 Difference]: Start difference. First operand 8140 states and 11513 transitions. Second operand 5 states. [2020-10-26 23:05:00,619 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 23:05:31,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:05:31,541 INFO L93 Difference]: Finished difference Result 20502 states and 30484 transitions. [2020-10-26 23:05:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:05:31,549 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 185 [2020-10-26 23:05:31,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:05:31,603 INFO L225 Difference]: With dead ends: 20502 [2020-10-26 23:05:31,603 INFO L226 Difference]: Without dead ends: 13171 [2020-10-26 23:05:31,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:05:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13171 states. [2020-10-26 23:05:31,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13171 to 13076. [2020-10-26 23:05:31,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13076 states. [2020-10-26 23:05:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13076 states to 13076 states and 18093 transitions. [2020-10-26 23:05:31,936 INFO L78 Accepts]: Start accepts. Automaton has 13076 states and 18093 transitions. Word has length 185 [2020-10-26 23:05:31,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:05:31,937 INFO L481 AbstractCegarLoop]: Abstraction has 13076 states and 18093 transitions. [2020-10-26 23:05:31,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:05:31,937 INFO L276 IsEmpty]: Start isEmpty. Operand 13076 states and 18093 transitions. [2020-10-26 23:05:31,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-26 23:05:31,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:05:31,943 INFO L422 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:05:31,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:05:31,943 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:05:31,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:05:31,944 INFO L82 PathProgramCache]: Analyzing trace with hash 613811753, now seen corresponding path program 1 times [2020-10-26 23:05:31,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:05:31,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494000990] [2020-10-26 23:05:31,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:05:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:32,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:32,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:32,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:33,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:33,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:35,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:35,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:05:35,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:05:35,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3243 [2020-10-26 23:05:35,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:35,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:05:35,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:05:35,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 211 [2020-10-26 23:05:35,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:35,458 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:05:35,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:05:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:35,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:35,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:35,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:05:35,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:35,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 23:05:35,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:35,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:05:35,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:05:35,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:05:35,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:35,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:05:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:35,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:35,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:35,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:35,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:05:35,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:05:35,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-26 23:05:35,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:35,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:05:35,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:05:35,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:05:35,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:35,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:05:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:05:35,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:05:36,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:05:36,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 23:05:36,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:05:36,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-26 23:05:36,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:05:36,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:05:36,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:05:36,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 23:05:36,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:05:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 97 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:05:36,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494000990] [2020-10-26 23:05:36,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:05:36,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:05:36,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810660432] [2020-10-26 23:05:36,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:05:36,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:05:36,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:05:36,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:05:36,360 INFO L87 Difference]: Start difference. First operand 13076 states and 18093 transitions. Second operand 8 states. [2020-10-26 23:05:36,538 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:05:39,620 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-26 23:06:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:06:10,057 INFO L93 Difference]: Finished difference Result 35805 states and 52583 transitions. [2020-10-26 23:06:10,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:06:10,060 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 261 [2020-10-26 23:06:10,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:06:10,174 INFO L225 Difference]: With dead ends: 35805 [2020-10-26 23:06:10,174 INFO L226 Difference]: Without dead ends: 23538 [2020-10-26 23:06:10,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:06:10,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23538 states. [2020-10-26 23:06:10,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23538 to 23370. [2020-10-26 23:06:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23370 states. [2020-10-26 23:06:11,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23370 states to 23370 states and 31305 transitions. [2020-10-26 23:06:11,026 INFO L78 Accepts]: Start accepts. Automaton has 23370 states and 31305 transitions. Word has length 261 [2020-10-26 23:06:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:06:11,027 INFO L481 AbstractCegarLoop]: Abstraction has 23370 states and 31305 transitions. [2020-10-26 23:06:11,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:06:11,027 INFO L276 IsEmpty]: Start isEmpty. Operand 23370 states and 31305 transitions. [2020-10-26 23:06:11,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-26 23:06:11,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:06:11,033 INFO L422 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, 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, 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] [2020-10-26 23:06:11,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:06:11,034 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:06:11,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:06:11,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1742195731, now seen corresponding path program 1 times [2020-10-26 23:06:11,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:06:11,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692025832] [2020-10-26 23:06:11,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:06:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:11,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:11,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:12,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:12,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 285 [2020-10-26 23:06:12,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:06:12,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1715 [2020-10-26 23:06:12,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:12,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:06:12,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:06:12,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-26 23:06:12,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:13,013 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:06:13,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:06:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:13,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:13,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:13,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:06:13,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:06:13,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:06:13,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:13,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:06:13,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:06:13,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:06:13,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:13,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:06:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:13,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:13,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:13,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:06:13,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:06:13,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-26 23:06:13,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:13,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:06:13,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:06:13,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:06:13,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:13,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:06:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:13,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:13,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:13,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 23:06:13,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:06:13,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-26 23:06:13,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:13,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:06:13,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:06:13,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 23:06:13,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:06:13,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692025832] [2020-10-26 23:06:13,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:06:13,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:06:13,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861186411] [2020-10-26 23:06:13,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:06:13,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:06:13,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:06:13,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:06:13,734 INFO L87 Difference]: Start difference. First operand 23370 states and 31305 transitions. Second operand 7 states. [2020-10-26 23:06:14,839 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:06:19,593 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 69