/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 12:39:56,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 12:39:56,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 12:39:56,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 12:39:56,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 12:39:56,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 12:39:56,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 12:39:56,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 12:39:56,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 12:39:56,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 12:39:56,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 12:39:56,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 12:39:56,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 12:39:56,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 12:39:56,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 12:39:56,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 12:39:56,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 12:39:56,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 12:39:57,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 12:39:57,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 12:39:57,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 12:39:57,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 12:39:57,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 12:39:57,034 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 12:39:57,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 12:39:57,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 12:39:57,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 12:39:57,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 12:39:57,050 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 12:39:57,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 12:39:57,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 12:39:57,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 12:39:57,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 12:39:57,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 12:39:57,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 12:39:57,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 12:39:57,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 12:39:57,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 12:39:57,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 12:39:57,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 12:39:57,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 12:39:57,071 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 [2020-10-28 12:39:57,119 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 12:39:57,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 12:39:57,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 12:39:57,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 12:39:57,122 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 12:39:57,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 12:39:57,122 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 12:39:57,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 12:39:57,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 12:39:57,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 12:39:57,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 12:39:57,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 12:39:57,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 12:39:57,124 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 12:39:57,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 12:39:57,124 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 12:39:57,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 12:39:57,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 12:39:57,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 12:39:57,125 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 12:39:57,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 12:39:57,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 12:39:57,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 12:39:57,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 12:39:57,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 12:39:57,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 12:39:57,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 12:39:57,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 12:39:57,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 12:39:57,127 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 12:39:57,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 12:39:57,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 12:39:57,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 12:39:57,620 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 12:39:57,621 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 12:39:57,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label41.c [2020-10-28 12:39:57,732 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18a00f1fc/0545d6dd50a1455fa1f1f549d75c1e26/FLAGba8a44ae0 [2020-10-28 12:39:58,841 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 12:39:58,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label41.c [2020-10-28 12:39:58,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18a00f1fc/0545d6dd50a1455fa1f1f549d75c1e26/FLAGba8a44ae0 [2020-10-28 12:39:59,286 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/18a00f1fc/0545d6dd50a1455fa1f1f549d75c1e26 [2020-10-28 12:39:59,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 12:39:59,302 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 12:39:59,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 12:39:59,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 12:39:59,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 12:39:59,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:39:59" (1/1) ... [2020-10-28 12:39:59,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a47a54e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:59, skipping insertion in model container [2020-10-28 12:39:59,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:39:59" (1/1) ... [2020-10-28 12:39:59,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 12:39:59,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 12:40:01,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:40:01,312 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 12:40:02,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:40:02,224 INFO L208 MainTranslator]: Completed translation [2020-10-28 12:40:02,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:02 WrapperNode [2020-10-28 12:40:02,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 12:40:02,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 12:40:02,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 12:40:02,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 12:40:02,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:02" (1/1) ... [2020-10-28 12:40:02,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:02" (1/1) ... [2020-10-28 12:40:02,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:02" (1/1) ... [2020-10-28 12:40:02,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:02" (1/1) ... [2020-10-28 12:40:02,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:02" (1/1) ... [2020-10-28 12:40:02,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:02" (1/1) ... [2020-10-28 12:40:02,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:02" (1/1) ... [2020-10-28 12:40:02,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 12:40:02,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 12:40:02,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 12:40:02,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 12:40:02,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:02" (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 [2020-10-28 12:40:03,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 12:40:03,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 12:40:03,040 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 12:40:03,040 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 12:40:03,040 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 12:40:03,041 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 12:40:03,041 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 12:40:03,041 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 12:40:03,041 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 12:40:03,041 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 12:40:03,042 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 12:40:03,042 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 12:40:03,042 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 12:40:03,042 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 12:40:03,042 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 12:40:03,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 12:40:03,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 12:40:03,043 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 12:40:03,043 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 12:40:03,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 12:40:03,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 12:40:03,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 12:40:03,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 12:40:03,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 12:40:03,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 12:40:14,076 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 12:40:14,077 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 12:40:14,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:40:14 BoogieIcfgContainer [2020-10-28 12:40:14,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 12:40:14,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 12:40:14,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 12:40:14,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 12:40:14,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:39:59" (1/3) ... [2020-10-28 12:40:14,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790d5e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:40:14, skipping insertion in model container [2020-10-28 12:40:14,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:02" (2/3) ... [2020-10-28 12:40:14,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790d5e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:40:14, skipping insertion in model container [2020-10-28 12:40:14,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:40:14" (3/3) ... [2020-10-28 12:40:14,094 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label41.c [2020-10-28 12:40:14,109 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 12:40:14,117 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 12:40:14,133 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 12:40:14,172 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 12:40:14,172 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 12:40:14,172 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 12:40:14,172 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 12:40:14,173 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 12:40:14,173 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 12:40:14,173 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 12:40:14,173 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 12:40:14,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-28 12:40:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 12:40:14,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:40:14,226 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] [2020-10-28 12:40:14,226 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:40:14,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:40:14,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1233469150, now seen corresponding path program 1 times [2020-10-28 12:40:14,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:40:14,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179503724] [2020-10-28 12:40:14,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:40:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:40:14,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:15,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:40:15,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 12:40:15,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:40:15,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 565 [2020-10-28 12:40:15,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:40:15,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:40:15,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:40:15,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:40:15,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 12:40:15,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 12:40:15,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:40:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:40:15,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:15,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:40:15,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:40:15,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:40:15,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 12:40:15,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:40:15,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:40:15,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:40:15,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:40:15,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:40:15,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:40:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:40:15,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179503724] [2020-10-28 12:40:15,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:40:15,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 12:40:15,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479749561] [2020-10-28 12:40:15,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:40:15,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:40:15,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:40:15,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:40:15,489 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 5 states. [2020-10-28 12:40:37,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:40:37,470 INFO L93 Difference]: Finished difference Result 4085 states and 7568 transitions. [2020-10-28 12:40:37,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 12:40:37,473 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-10-28 12:40:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:40:37,516 INFO L225 Difference]: With dead ends: 4085 [2020-10-28 12:40:37,516 INFO L226 Difference]: Without dead ends: 2873 [2020-10-28 12:40:37,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:40:37,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2020-10-28 12:40:37,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 1935. [2020-10-28 12:40:37,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1935 states. [2020-10-28 12:40:37,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 3164 transitions. [2020-10-28 12:40:37,792 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 3164 transitions. Word has length 51 [2020-10-28 12:40:37,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:40:37,795 INFO L481 AbstractCegarLoop]: Abstraction has 1935 states and 3164 transitions. [2020-10-28 12:40:37,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:40:37,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 3164 transitions. [2020-10-28 12:40:37,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-28 12:40:37,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:40:37,811 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:40:37,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 12:40:37,812 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:40:37,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:40:37,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1531828183, now seen corresponding path program 1 times [2020-10-28 12:40:37,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:40:37,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542649811] [2020-10-28 12:40:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:40:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:40:37,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:38,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:39,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:40,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:40:40,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-28 12:40:40,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:40:40,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2961 [2020-10-28 12:40:40,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:40:40,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:40:40,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:40:40,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:40:40,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 12:40:40,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 12:40:41,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:40:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:40:41,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:41,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:40:41,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:40:41,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:40:41,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 12:40:41,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:40:41,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:40:41,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:40:41,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:40:41,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:40:41,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:40:41,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:40:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:40:41,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:41,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:40:41,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 12:40:41,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:40:41,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-28 12:40:41,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:40:41,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:40:41,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:40:41,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:40:41,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 12:40:41,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:40:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:40:41,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542649811] [2020-10-28 12:40:41,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:40:41,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:40:41,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039869691] [2020-10-28 12:40:41,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:40:41,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:40:41,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:40:41,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:40:41,403 INFO L87 Difference]: Start difference. First operand 1935 states and 3164 transitions. Second operand 7 states. [2020-10-28 12:41:12,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:41:12,110 INFO L93 Difference]: Finished difference Result 5670 states and 9395 transitions. [2020-10-28 12:41:12,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:41:12,111 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 126 [2020-10-28 12:41:12,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:41:12,140 INFO L225 Difference]: With dead ends: 5670 [2020-10-28 12:41:12,141 INFO L226 Difference]: Without dead ends: 3741 [2020-10-28 12:41:12,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:41:12,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3741 states. [2020-10-28 12:41:12,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3741 to 3646. [2020-10-28 12:41:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3646 states. [2020-10-28 12:41:12,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 5458 transitions. [2020-10-28 12:41:12,309 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 5458 transitions. Word has length 126 [2020-10-28 12:41:12,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:41:12,312 INFO L481 AbstractCegarLoop]: Abstraction has 3646 states and 5458 transitions. [2020-10-28 12:41:12,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:41:12,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 5458 transitions. [2020-10-28 12:41:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-28 12:41:12,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:41:12,319 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:41:12,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 12:41:12,319 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:41:12,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:41:12,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1579632475, now seen corresponding path program 1 times [2020-10-28 12:41:12,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:41:12,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437302578] [2020-10-28 12:41:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:41:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:12,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:12,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:13,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:13,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-28 12:41:13,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:41:13,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1348 [2020-10-28 12:41:13,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:13,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:13,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:41:13,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:41:13,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:41:13,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 12:41:13,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:41:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:13,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:13,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:13,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:41:13,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:41:13,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 12:41:13,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:13,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:13,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:41:13,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:41:13,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:41:13,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:41:13,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:41:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:14,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:14,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:14,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 12:41:14,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:41:14,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-28 12:41:14,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:14,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:14,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:41:14,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:41:14,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 12:41:14,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:41:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:41:14,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437302578] [2020-10-28 12:41:14,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:41:14,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:41:14,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322404637] [2020-10-28 12:41:14,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:41:14,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:41:14,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:41:14,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:41:14,337 INFO L87 Difference]: Start difference. First operand 3646 states and 5458 transitions. Second operand 7 states. [2020-10-28 12:41:44,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:41:44,642 INFO L93 Difference]: Finished difference Result 10994 states and 16919 transitions. [2020-10-28 12:41:44,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:41:44,646 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 140 [2020-10-28 12:41:44,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:41:44,706 INFO L225 Difference]: With dead ends: 10994 [2020-10-28 12:41:44,707 INFO L226 Difference]: Without dead ends: 7354 [2020-10-28 12:41:44,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:41:44,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7354 states. [2020-10-28 12:41:44,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7354 to 7142. [2020-10-28 12:41:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7142 states. [2020-10-28 12:41:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 9667 transitions. [2020-10-28 12:41:45,000 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 9667 transitions. Word has length 140 [2020-10-28 12:41:45,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:41:45,001 INFO L481 AbstractCegarLoop]: Abstraction has 7142 states and 9667 transitions. [2020-10-28 12:41:45,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:41:45,001 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 9667 transitions. [2020-10-28 12:41:45,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-28 12:41:45,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:41:45,004 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:41:45,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 12:41:45,005 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:41:45,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:41:45,006 INFO L82 PathProgramCache]: Analyzing trace with hash 952778607, now seen corresponding path program 1 times [2020-10-28 12:41:45,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:41:45,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687780952] [2020-10-28 12:41:45,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:41:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:45,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:45,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:45,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:46,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:46,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-28 12:41:46,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:41:46,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1864 [2020-10-28 12:41:46,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:46,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:46,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:41:46,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:41:46,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-28 12:41:46,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:41:47,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:41:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:47,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:47,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:47,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:41:47,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:41:47,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 12:41:47,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:47,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:47,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:41:47,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:41:47,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:41:47,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:41:47,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:41:47,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:47,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:47,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:47,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 12:41:47,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:41:47,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-28 12:41:47,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:47,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:47,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:41:47,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:41:47,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-28 12:41:47,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 12:41:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:41:47,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687780952] [2020-10-28 12:41:47,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:41:47,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:41:47,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028986415] [2020-10-28 12:41:47,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:41:47,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:41:47,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:41:47,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:41:47,659 INFO L87 Difference]: Start difference. First operand 7142 states and 9667 transitions. Second operand 7 states. [2020-10-28 12:41:49,694 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:42:17,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:42:17,892 INFO L93 Difference]: Finished difference Result 21454 states and 30522 transitions. [2020-10-28 12:42:17,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:42:17,894 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 169 [2020-10-28 12:42:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:42:17,983 INFO L225 Difference]: With dead ends: 21454 [2020-10-28 12:42:17,983 INFO L226 Difference]: Without dead ends: 14318 [2020-10-28 12:42:18,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:42:18,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14318 states. [2020-10-28 12:42:18,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14318 to 14165. [2020-10-28 12:42:18,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14165 states. [2020-10-28 12:42:18,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14165 states to 14165 states and 18278 transitions. [2020-10-28 12:42:18,521 INFO L78 Accepts]: Start accepts. Automaton has 14165 states and 18278 transitions. Word has length 169 [2020-10-28 12:42:18,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:42:18,524 INFO L481 AbstractCegarLoop]: Abstraction has 14165 states and 18278 transitions. [2020-10-28 12:42:18,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:42:18,524 INFO L276 IsEmpty]: Start isEmpty. Operand 14165 states and 18278 transitions. [2020-10-28 12:42:18,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-28 12:42:18,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:42:18,530 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:42:18,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 12:42:18,530 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:42:18,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:42:18,531 INFO L82 PathProgramCache]: Analyzing trace with hash -619485380, now seen corresponding path program 1 times [2020-10-28 12:42:18,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:42:18,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095926466] [2020-10-28 12:42:18,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:42:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:42:18,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:18,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:42:19,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-28 12:42:19,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:42:19,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-28 12:42:19,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:42:19,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:42:19,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:42:19,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-28 12:42:19,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 12:42:19,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:42:19,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:42:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:42:19,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:19,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:42:19,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:42:19,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:42:19,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 12:42:19,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:42:19,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:42:19,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:42:19,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:42:19,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:42:19,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:42:19,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:42:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:42:19,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:19,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:42:19,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 12:42:19,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:42:19,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-28 12:42:19,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:42:19,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:42:19,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:42:19,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:42:19,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-28 12:42:19,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:42:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:42:19,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095926466] [2020-10-28 12:42:19,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:42:19,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:42:19,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329754234] [2020-10-28 12:42:19,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:42:19,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:42:19,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:42:19,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:42:19,559 INFO L87 Difference]: Start difference. First operand 14165 states and 18278 transitions. Second operand 5 states. [2020-10-28 12:42:47,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:42:47,332 INFO L93 Difference]: Finished difference Result 35132 states and 45046 transitions. [2020-10-28 12:42:47,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:42:47,335 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 180 [2020-10-28 12:42:47,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:42:47,442 INFO L225 Difference]: With dead ends: 35132 [2020-10-28 12:42:47,443 INFO L226 Difference]: Without dead ends: 20973 [2020-10-28 12:42:47,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:42:47,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20973 states. [2020-10-28 12:42:48,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20973 to 18491. [2020-10-28 12:42:48,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18491 states. [2020-10-28 12:42:48,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18491 states to 18491 states and 23361 transitions. [2020-10-28 12:42:48,073 INFO L78 Accepts]: Start accepts. Automaton has 18491 states and 23361 transitions. Word has length 180 [2020-10-28 12:42:48,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:42:48,074 INFO L481 AbstractCegarLoop]: Abstraction has 18491 states and 23361 transitions. [2020-10-28 12:42:48,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:42:48,075 INFO L276 IsEmpty]: Start isEmpty. Operand 18491 states and 23361 transitions. [2020-10-28 12:42:48,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-28 12:42:48,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:42:48,081 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:42:48,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 12:42:48,082 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:42:48,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:42:48,082 INFO L82 PathProgramCache]: Analyzing trace with hash 959312730, now seen corresponding path program 1 times [2020-10-28 12:42:48,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:42:48,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054147623] [2020-10-28 12:42:48,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:42:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:42:48,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:48,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:49,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:53,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:42:53,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-28 12:42:53,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:42:53,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 12:42:53,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:42:53,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:42:53,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:42:53,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-28 12:42:53,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 12:42:53,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:42:53,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:42:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:42:53,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:53,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:42:53,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:42:53,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:42:53,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 12:42:53,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:42:53,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:42:53,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:42:53,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:42:53,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:42:53,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:42:53,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:42:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:42:53,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:53,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:42:53,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 12:42:53,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:42:53,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-28 12:42:53,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:42:53,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:42:53,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:42:53,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:42:53,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 12:42:53,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:42:53,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-28 12:42:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:42:53,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:53,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:42:53,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 12:42:53,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:42:53,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-28 12:42:53,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:42:53,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:42:53,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:42:53,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:42:53,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 12:42:53,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:42:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 176 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:42:54,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054147623] [2020-10-28 12:42:54,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:42:54,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:42:54,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252542023] [2020-10-28 12:42:54,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:42:54,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:42:54,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:42:54,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:42:54,075 INFO L87 Difference]: Start difference. First operand 18491 states and 23361 transitions. Second operand 7 states. [2020-10-28 12:42:55,266 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:43:33,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:43:33,292 INFO L93 Difference]: Finished difference Result 47449 states and 69399 transitions. [2020-10-28 12:43:33,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:43:33,295 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 249 [2020-10-28 12:43:33,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:43:33,478 INFO L225 Difference]: With dead ends: 47449 [2020-10-28 12:43:33,478 INFO L226 Difference]: Without dead ends: 28103 [2020-10-28 12:43:33,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:43:33,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28103 states. [2020-10-28 12:43:34,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28103 to 26677. [2020-10-28 12:43:34,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26677 states. [2020-10-28 12:43:34,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26677 states to 26677 states and 33787 transitions. [2020-10-28 12:43:34,527 INFO L78 Accepts]: Start accepts. Automaton has 26677 states and 33787 transitions. Word has length 249 [2020-10-28 12:43:34,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:43:34,528 INFO L481 AbstractCegarLoop]: Abstraction has 26677 states and 33787 transitions. [2020-10-28 12:43:34,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:43:34,528 INFO L276 IsEmpty]: Start isEmpty. Operand 26677 states and 33787 transitions. [2020-10-28 12:43:34,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-28 12:43:34,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:43:34,535 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:43:34,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 12:43:34,536 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:43:34,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:43:34,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1997510590, now seen corresponding path program 1 times [2020-10-28 12:43:34,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:43:34,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343781643] [2020-10-28 12:43:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:43:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:43:34,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:34,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:34,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:39,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:43:39,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-28 12:43:39,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:43:39,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 12:43:39,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:43:39,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:43:39,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:43:39,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-28 12:43:39,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-28 12:43:39,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:43:39,847 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:43:39,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:43:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:43:39,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:39,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:43:39,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:43:39,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:43:39,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 12:43:39,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:43:39,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:43:39,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:43:39,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:43:39,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:43:39,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:43:39,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:43:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:43:39,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:40,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:43:40,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 12:43:40,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:43:40,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-28 12:43:40,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:43:40,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:43:40,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:43:40,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:43:40,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 12:43:40,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:43:40,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-28 12:43:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:43:40,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:40,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:43:40,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 12:43:40,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:43:40,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-28 12:43:40,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:43:40,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:43:40,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:43:40,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:43:40,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 12:43:40,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:43:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 176 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:43:40,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343781643] [2020-10-28 12:43:40,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:43:40,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:43:40,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866554552] [2020-10-28 12:43:40,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:43:40,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:43:40,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:43:40,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:43:40,501 INFO L87 Difference]: Start difference. First operand 26677 states and 33787 transitions. Second operand 7 states. [2020-10-28 12:43:40,705 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 66