/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/Problem06_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:42:46,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:42:46,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:42:46,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:42:46,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:42:46,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:42:46,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:42:46,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:42:46,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:42:46,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:42:46,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:42:46,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:42:46,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:42:46,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:42:46,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:42:46,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:42:46,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:42:46,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:42:46,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:42:46,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:42:46,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:42:46,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:42:46,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:42:46,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:42:46,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:42:46,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:42:46,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:42:46,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:42:46,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:42:46,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:42:46,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:42:46,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:42:46,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:42:46,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:42:46,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:42:46,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:42:46,995 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:42:46,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:42:46,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:42:46,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:42:46,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:42:47,002 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 21:42:47,030 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:42:47,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:42:47,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:42:47,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:42:47,033 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:42:47,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:42:47,033 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:42:47,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:42:47,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:42:47,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:42:47,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:42:47,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:42:47,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:42:47,035 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:42:47,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:42:47,036 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:42:47,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:42:47,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:42:47,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:42:47,037 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:42:47,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:42:47,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:42:47,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:42:47,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:42:47,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:42:47,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:42:47,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:42:47,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:42:47,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:42:47,040 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:42:47,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:42:47,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:42:47,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:42:47,467 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:42:47,468 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:42:47,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label58.c [2020-10-26 21:42:47,566 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/99ba5131a/a9b2bfe5ef124e55b307ea61179fadc0/FLAGc4fed5cd5 [2020-10-26 21:42:48,915 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:42:48,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label58.c [2020-10-26 21:42:48,982 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/99ba5131a/a9b2bfe5ef124e55b307ea61179fadc0/FLAGc4fed5cd5 [2020-10-26 21:42:49,077 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/99ba5131a/a9b2bfe5ef124e55b307ea61179fadc0 [2020-10-26 21:42:49,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:42:49,090 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:42:49,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:42:49,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:42:49,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:42:49,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:42:49" (1/1) ... [2020-10-26 21:42:49,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cbadeea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:42:49, skipping insertion in model container [2020-10-26 21:42:49,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:42:49" (1/1) ... [2020-10-26 21:42:49,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:42:49,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:42:51,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:42:51,576 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:42:52,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:42:53,017 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:42:53,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:42:53 WrapperNode [2020-10-26 21:42:53,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:42:53,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:42:53,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:42:53,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:42:53,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:42:53" (1/1) ... [2020-10-26 21:42:53,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:42:53" (1/1) ... [2020-10-26 21:42:53,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:42:53" (1/1) ... [2020-10-26 21:42:53,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:42:53" (1/1) ... [2020-10-26 21:42:53,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:42:53" (1/1) ... [2020-10-26 21:42:53,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:42:53" (1/1) ... [2020-10-26 21:42:53,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:42:53" (1/1) ... [2020-10-26 21:42:53,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:42:53,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:42:53,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:42:53,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:42:53,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:42:53" (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 21:42:53,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:42:53,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:42:53,748 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:42:53,748 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:42:53,749 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:42:53,749 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:42:53,749 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:42:53,749 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:42:53,750 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:42:53,750 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:42:53,751 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:42:53,751 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:42:53,751 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:42:53,751 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:42:53,752 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:42:53,753 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:42:53,753 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:42:53,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:42:53,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:42:53,753 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:42:53,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:42:53,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:42:53,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:42:53,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:42:53,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:42:53,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:42:53,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:43:01,934 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:43:01,937 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:43:01,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:43:01 BoogieIcfgContainer [2020-10-26 21:43:01,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:43:01,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:43:01,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:43:01,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:43:01,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:42:49" (1/3) ... [2020-10-26 21:43:01,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edf6ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:43:01, skipping insertion in model container [2020-10-26 21:43:01,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:42:53" (2/3) ... [2020-10-26 21:43:01,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edf6ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:43:01, skipping insertion in model container [2020-10-26 21:43:01,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:43:01" (3/3) ... [2020-10-26 21:43:01,955 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label58.c [2020-10-26 21:43:01,968 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:43:01,978 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:43:01,993 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:43:02,042 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:43:02,043 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:43:02,043 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:43:02,043 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:43:02,043 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:43:02,043 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:43:02,043 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:43:02,044 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:43:02,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-26 21:43:02,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 970 [2020-10-26 21:43:02,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:43:02,161 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:43:02,161 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:43:02,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:43:02,169 INFO L82 PathProgramCache]: Analyzing trace with hash -860885364, now seen corresponding path program 1 times [2020-10-26 21:43:02,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:43:02,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084518979] [2020-10-26 21:43:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:43:03,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:43:03,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:06,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:08,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:43:08,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 987 [2020-10-26 21:43:08,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:43:08,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5400 [2020-10-26 21:43:08,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:43:08,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 21:43:08,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:43:08,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 978 [2020-10-26 21:43:08,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 21:43:10,238 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:43:10,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:43:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:43:10,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:10,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:43:10,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:43:10,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:43:10,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 21:43:10,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:43:10,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:43:10,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:43:10,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:43:10,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:43:11,404 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 21:43:11,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084518979] [2020-10-26 21:43:11,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:43:11,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 21:43:11,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149945978] [2020-10-26 21:43:11,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 21:43:11,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:43:11,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 21:43:11,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 21:43:11,432 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 4 states. [2020-10-26 21:43:11,777 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:43:29,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:43:29,332 INFO L93 Difference]: Finished difference Result 3770 states and 7012 transitions. [2020-10-26 21:43:29,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 21:43:29,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 969 [2020-10-26 21:43:29,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:43:29,393 INFO L225 Difference]: With dead ends: 3770 [2020-10-26 21:43:29,393 INFO L226 Difference]: Without dead ends: 2387 [2020-10-26 21:43:29,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 21:43:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2020-10-26 21:43:29,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 2374. [2020-10-26 21:43:29,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2374 states. [2020-10-26 21:43:29,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 3972 transitions. [2020-10-26 21:43:29,612 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 3972 transitions. Word has length 969 [2020-10-26 21:43:29,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:43:29,615 INFO L481 AbstractCegarLoop]: Abstraction has 2374 states and 3972 transitions. [2020-10-26 21:43:29,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 21:43:29,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 3972 transitions. [2020-10-26 21:43:29,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 982 [2020-10-26 21:43:29,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:43:29,659 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:43:29,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:43:29,660 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:43:29,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:43:29,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1254874893, now seen corresponding path program 1 times [2020-10-26 21:43:29,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:43:29,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740346666] [2020-10-26 21:43:29,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:43:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:43:29,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:32,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:35,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:43:35,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1001 [2020-10-26 21:43:35,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:43:35,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5222 [2020-10-26 21:43:35,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:43:35,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:43:35,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:43:35,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 21:43:35,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 21:43:35,505 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:43:35,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:43:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:43:35,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:35,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:43:35,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:43:35,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:43:35,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 21:43:35,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:43:35,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:43:35,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:43:35,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:43:35,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:43:35,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:43:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:43:35,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:43:35,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:43:35,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 21:43:35,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:43:35,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 21:43:35,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:43:35,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:43:35,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:43:35,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 21:43:35,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:43:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:43:36,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740346666] [2020-10-26 21:43:36,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:43:36,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:43:36,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579998368] [2020-10-26 21:43:36,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:43:36,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:43:36,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:43:36,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:43:36,727 INFO L87 Difference]: Start difference. First operand 2374 states and 3972 transitions. Second operand 7 states. [2020-10-26 21:43:37,027 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:43:38,261 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 21:43:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:43:58,779 INFO L93 Difference]: Finished difference Result 6954 states and 11751 transitions. [2020-10-26 21:43:58,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 21:43:58,788 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 981 [2020-10-26 21:43:58,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:43:58,821 INFO L225 Difference]: With dead ends: 6954 [2020-10-26 21:43:58,821 INFO L226 Difference]: Without dead ends: 4586 [2020-10-26 21:43:58,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:43:58,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2020-10-26 21:43:58,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 4542. [2020-10-26 21:43:59,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4542 states. [2020-10-26 21:43:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4542 states to 4542 states and 7000 transitions. [2020-10-26 21:43:59,024 INFO L78 Accepts]: Start accepts. Automaton has 4542 states and 7000 transitions. Word has length 981 [2020-10-26 21:43:59,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:43:59,025 INFO L481 AbstractCegarLoop]: Abstraction has 4542 states and 7000 transitions. [2020-10-26 21:43:59,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:43:59,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4542 states and 7000 transitions. [2020-10-26 21:43:59,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 986 [2020-10-26 21:43:59,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:43:59,051 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:43:59,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:43:59,052 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:43:59,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:43:59,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1084886853, now seen corresponding path program 1 times [2020-10-26 21:43:59,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:43:59,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550034197] [2020-10-26 21:43:59,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:43:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:43:59,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:44:02,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:44:04,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:44:04,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1005 [2020-10-26 21:44:04,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:44:04,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 21:44:04,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:44:04,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:44:04,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:44:04,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 21:44:04,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:44:04,685 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:44:04,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:44:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:44:04,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:44:04,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:44:04,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:44:04,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:44:04,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 21:44:04,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:44:04,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:44:04,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:44:04,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:44:04,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:44:04,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:44:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:44:04,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:44:04,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:44:04,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 21:44:04,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:44:04,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-26 21:44:04,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:44:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:44:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:44:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 21:44:04,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:44:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:44:05,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550034197] [2020-10-26 21:44:05,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:44:05,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:44:05,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494594686] [2020-10-26 21:44:05,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:44:05,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:44:05,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:44:05,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:44:05,462 INFO L87 Difference]: Start difference. First operand 4542 states and 7000 transitions. Second operand 7 states. [2020-10-26 21:44:05,747 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:44:06,503 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:44:27,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:44:27,921 INFO L93 Difference]: Finished difference Result 13591 states and 21492 transitions. [2020-10-26 21:44:27,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:44:27,923 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 985 [2020-10-26 21:44:27,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:44:27,979 INFO L225 Difference]: With dead ends: 13591 [2020-10-26 21:44:27,979 INFO L226 Difference]: Without dead ends: 9055 [2020-10-26 21:44:27,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:44:28,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9055 states. [2020-10-26 21:44:28,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9055 to 8883. [2020-10-26 21:44:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8883 states. [2020-10-26 21:44:28,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8883 states to 8883 states and 13853 transitions. [2020-10-26 21:44:28,294 INFO L78 Accepts]: Start accepts. Automaton has 8883 states and 13853 transitions. Word has length 985 [2020-10-26 21:44:28,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:44:28,295 INFO L481 AbstractCegarLoop]: Abstraction has 8883 states and 13853 transitions. [2020-10-26 21:44:28,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:44:28,295 INFO L276 IsEmpty]: Start isEmpty. Operand 8883 states and 13853 transitions. [2020-10-26 21:44:28,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 990 [2020-10-26 21:44:28,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:44:28,343 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:44:28,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 21:44:28,344 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:44:28,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:44:28,345 INFO L82 PathProgramCache]: Analyzing trace with hash -633149166, now seen corresponding path program 1 times [2020-10-26 21:44:28,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:44:28,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803832421] [2020-10-26 21:44:28,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:44:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:44:28,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:44:28,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:44:33,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:44:33,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1011 [2020-10-26 21:44:33,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:44:33,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5192 [2020-10-26 21:44:33,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:44:33,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:44:33,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:44:33,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 21:44:33,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:44:34,057 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:44:34,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:44:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:44:34,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:44:34,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:44:34,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:44:34,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:44:34,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 21:44:34,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:44:34,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:44:34,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:44:34,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:44:34,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:44:34,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:44:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:44:34,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:44:34,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:44:34,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 21:44:34,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:44:34,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 21:44:34,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:44:34,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:44:34,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:44:34,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 21:44:34,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:44:34,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-26 21:44:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:44:34,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:44:34,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:44:34,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 21:44:34,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:44:34,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 21:44:34,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:44:34,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:44:34,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-26 21:44:34,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:44:34,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:44:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 21:44:34,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803832421] [2020-10-26 21:44:34,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:44:34,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:44:34,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727938929] [2020-10-26 21:44:34,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:44:34,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:44:34,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:44:34,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:44:34,930 INFO L87 Difference]: Start difference. First operand 8883 states and 13853 transitions. Second operand 7 states. [2020-10-26 21:44:35,214 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:44:58,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:44:58,644 INFO L93 Difference]: Finished difference Result 26782 states and 42483 transitions. [2020-10-26 21:44:58,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 21:44:58,645 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 989 [2020-10-26 21:44:58,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:44:58,734 INFO L225 Difference]: With dead ends: 26782 [2020-10-26 21:44:58,734 INFO L226 Difference]: Without dead ends: 17905 [2020-10-26 21:44:58,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-26 21:44:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17905 states. [2020-10-26 21:44:59,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17905 to 17855. [2020-10-26 21:44:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17855 states. [2020-10-26 21:44:59,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17855 states to 17855 states and 28361 transitions. [2020-10-26 21:44:59,302 INFO L78 Accepts]: Start accepts. Automaton has 17855 states and 28361 transitions. Word has length 989 [2020-10-26 21:44:59,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:44:59,303 INFO L481 AbstractCegarLoop]: Abstraction has 17855 states and 28361 transitions. [2020-10-26 21:44:59,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:44:59,303 INFO L276 IsEmpty]: Start isEmpty. Operand 17855 states and 28361 transitions. [2020-10-26 21:44:59,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1002 [2020-10-26 21:44:59,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:44:59,366 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:44:59,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 21:44:59,367 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:44:59,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:44:59,367 INFO L82 PathProgramCache]: Analyzing trace with hash 2141382161, now seen corresponding path program 1 times [2020-10-26 21:44:59,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:44:59,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106505734] [2020-10-26 21:44:59,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:44:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:44:59,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:44:59,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:45:04,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:45:04,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1023 [2020-10-26 21:45:04,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:45:04,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5170 [2020-10-26 21:45:04,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:45:04,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:45:04,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:45:04,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 21:45:04,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:45:05,126 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:45:05,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:45:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:45:05,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:45:05,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:45:05,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:45:05,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:45:05,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 21:45:05,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:45:05,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:45:05,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:45:05,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:45:05,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:45:05,285 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:45:05,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:45:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:45:05,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:45:05,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:45:05,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-26 21:45:05,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:45:05,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-26 21:45:05,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:45:05,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:45:05,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:45:05,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 21:45:05,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:45:05,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 21:45:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:45:05,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:45:05,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:45:05,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 21:45:05,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:45:05,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 21:45:05,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:45:05,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:45:05,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-26 21:45:05,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:45:05,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:45:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 21:45:05,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106505734] [2020-10-26 21:45:05,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:45:05,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:45:05,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809324901] [2020-10-26 21:45:05,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:45:05,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:45:05,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:45:05,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:45:05,988 INFO L87 Difference]: Start difference. First operand 17855 states and 28361 transitions. Second operand 7 states. [2020-10-26 21:45:06,277 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:45:08,583 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:45:28,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:45:28,936 INFO L93 Difference]: Finished difference Result 54691 states and 92455 transitions. [2020-10-26 21:45:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 21:45:28,937 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1001 [2020-10-26 21:45:28,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:45:29,107 INFO L225 Difference]: With dead ends: 54691 [2020-10-26 21:45:29,108 INFO L226 Difference]: Without dead ends: 36842 [2020-10-26 21:45:29,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:45:29,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36842 states. [2020-10-26 21:45:30,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36842 to 36261. [2020-10-26 21:45:30,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36261 states. [2020-10-26 21:45:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36261 states to 36261 states and 55948 transitions. [2020-10-26 21:45:30,428 INFO L78 Accepts]: Start accepts. Automaton has 36261 states and 55948 transitions. Word has length 1001 [2020-10-26 21:45:30,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:45:30,429 INFO L481 AbstractCegarLoop]: Abstraction has 36261 states and 55948 transitions. [2020-10-26 21:45:30,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:45:30,429 INFO L276 IsEmpty]: Start isEmpty. Operand 36261 states and 55948 transitions. [2020-10-26 21:45:30,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1031 [2020-10-26 21:45:30,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:45:30,562 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:45:30,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 21:45:30,563 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:45:30,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:45:30,564 INFO L82 PathProgramCache]: Analyzing trace with hash -234057225, now seen corresponding path program 1 times [2020-10-26 21:45:30,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:45:30,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249140778] [2020-10-26 21:45:30,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:45:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:45:30,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:45:31,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:45:35,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:45:35,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1052 [2020-10-26 21:45:35,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:45:35,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5172 [2020-10-26 21:45:35,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:45:35,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:45:35,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:45:35,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-26 21:45:35,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:45:36,339 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:45:36,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:45:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:45:36,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:45:36,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:45:36,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:45:36,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:45:36,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 21:45:36,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:45:36,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:45:36,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:45:36,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:45:36,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:45:36,489 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:45:36,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:45:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:45:36,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:45:36,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:45:36,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 21:45:36,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:45:36,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 21:45:36,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:45:36,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:45:36,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:45:36,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 21:45:36,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:45:36,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 21:45:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:45:36,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:45:36,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:45:36,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 21:45:36,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:45:36,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-26 21:45:36,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:45:36,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:45:36,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:45:36,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-26 21:45:36,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:45:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 56 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 21:45:37,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249140778] [2020-10-26 21:45:37,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:45:37,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:45:37,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715352013] [2020-10-26 21:45:37,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:45:37,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:45:37,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:45:37,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:45:37,611 INFO L87 Difference]: Start difference. First operand 36261 states and 55948 transitions. Second operand 8 states. [2020-10-26 21:45:37,911 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 21:45:39,535 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 21:46:01,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:46:01,970 INFO L93 Difference]: Finished difference Result 91656 states and 141848 transitions. [2020-10-26 21:46:01,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 21:46:01,972 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1030 [2020-10-26 21:46:01,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:46:02,177 INFO L225 Difference]: With dead ends: 91656 [2020-10-26 21:46:02,178 INFO L226 Difference]: Without dead ends: 55401 [2020-10-26 21:46:02,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-26 21:46:02,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55401 states. [2020-10-26 21:46:04,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55401 to 54795. [2020-10-26 21:46:04,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54795 states. [2020-10-26 21:46:04,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54795 states to 54795 states and 83166 transitions. [2020-10-26 21:46:04,536 INFO L78 Accepts]: Start accepts. Automaton has 54795 states and 83166 transitions. Word has length 1030 [2020-10-26 21:46:04,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:46:04,537 INFO L481 AbstractCegarLoop]: Abstraction has 54795 states and 83166 transitions. [2020-10-26 21:46:04,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:46:04,538 INFO L276 IsEmpty]: Start isEmpty. Operand 54795 states and 83166 transitions. [2020-10-26 21:46:05,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1047 [2020-10-26 21:46:05,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:46:05,005 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:46:05,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 21:46:05,006 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:46:05,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:46:05,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1094205261, now seen corresponding path program 1 times [2020-10-26 21:46:05,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:46:05,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740493811] [2020-10-26 21:46:05,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:46:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:46:05,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:46:05,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:46:06,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:46:10,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:46:10,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1070 [2020-10-26 21:46:10,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:46:10,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5328 [2020-10-26 21:46:10,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:46:10,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:46:10,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:46:10,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 21:46:10,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:46:10,969 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:46:10,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:46:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:46:10,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:46:10,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:46:10,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:46:10,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:46:10,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 21:46:10,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:46:10,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:46:10,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:46:10,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:46:10,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:46:11,132 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:46:11,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:46:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:46:11,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:46:11,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:46:11,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 21:46:11,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:46:11,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 21:46:11,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:46:11,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:46:11,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:46:11,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 21:46:11,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:46:11,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 21:46:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:46:11,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:46:11,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:46:11,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-26 21:46:11,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:46:11,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 21:46:11,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:46:11,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:46:11,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-26 21:46:11,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:46:11,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:46:11,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 21:46:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:46:11,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:46:11,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:46:11,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 21:46:11,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:46:11,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 21:46:11,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:46:11,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:46:11,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-26 21:46:11,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:46:11,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:46:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 68 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-26 21:46:12,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740493811] [2020-10-26 21:46:12,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:46:12,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:46:12,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862578574] [2020-10-26 21:46:12,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:46:12,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:46:12,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:46:12,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:46:12,381 INFO L87 Difference]: Start difference. First operand 54795 states and 83166 transitions. Second operand 7 states. [2020-10-26 21:46:12,685 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 21:46:14,591 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 169