/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/Problem17_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 13:32:23,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 13:32:23,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 13:32:23,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 13:32:23,241 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 13:32:23,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 13:32:23,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 13:32:23,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 13:32:23,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 13:32:23,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 13:32:23,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 13:32:23,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 13:32:23,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 13:32:23,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 13:32:23,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 13:32:23,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 13:32:23,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 13:32:23,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 13:32:23,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 13:32:23,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 13:32:23,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 13:32:23,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 13:32:23,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 13:32:23,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 13:32:23,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 13:32:23,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 13:32:23,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 13:32:23,329 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 13:32:23,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 13:32:23,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 13:32:23,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 13:32:23,335 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 13:32:23,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 13:32:23,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 13:32:23,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 13:32:23,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 13:32:23,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 13:32:23,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 13:32:23,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 13:32:23,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 13:32:23,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 13:32:23,348 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 13:32:23,378 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 13:32:23,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 13:32:23,381 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 13:32:23,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 13:32:23,381 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 13:32:23,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 13:32:23,382 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 13:32:23,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 13:32:23,383 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 13:32:23,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 13:32:23,383 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 13:32:23,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 13:32:23,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 13:32:23,384 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 13:32:23,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 13:32:23,385 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 13:32:23,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 13:32:23,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 13:32:23,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 13:32:23,386 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 13:32:23,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 13:32:23,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 13:32:23,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 13:32:23,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 13:32:23,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 13:32:23,388 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 13:32:23,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 13:32:23,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 13:32:23,388 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 13:32:23,389 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 13:32:23,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 13:32:23,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 13:32:23,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 13:32:23,967 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 13:32:23,968 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 13:32:23,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label11.c [2020-10-28 13:32:24,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a1e8771f/9a877fc5aa69468d8ba4d3b9a477dd72/FLAG46c74dd37 [2020-10-28 13:32:25,088 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 13:32:25,089 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label11.c [2020-10-28 13:32:25,115 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a1e8771f/9a877fc5aa69468d8ba4d3b9a477dd72/FLAG46c74dd37 [2020-10-28 13:32:25,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a1e8771f/9a877fc5aa69468d8ba4d3b9a477dd72 [2020-10-28 13:32:25,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 13:32:25,629 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 13:32:25,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 13:32:25,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 13:32:25,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 13:32:25,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:32:25" (1/1) ... [2020-10-28 13:32:25,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@145d721f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:32:25, skipping insertion in model container [2020-10-28 13:32:25,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:32:25" (1/1) ... [2020-10-28 13:32:25,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 13:32:25,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 13:32:26,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:32:26,957 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 13:32:27,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:32:27,584 INFO L208 MainTranslator]: Completed translation [2020-10-28 13:32:27,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:32:27 WrapperNode [2020-10-28 13:32:27,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 13:32:27,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 13:32:27,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 13:32:27,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 13:32:27,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:32:27" (1/1) ... [2020-10-28 13:32:27,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:32:27" (1/1) ... [2020-10-28 13:32:27,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:32:27" (1/1) ... [2020-10-28 13:32:27,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:32:27" (1/1) ... [2020-10-28 13:32:27,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:32:27" (1/1) ... [2020-10-28 13:32:27,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:32:27" (1/1) ... [2020-10-28 13:32:27,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:32:27" (1/1) ... [2020-10-28 13:32:27,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 13:32:27,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 13:32:27,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 13:32:27,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 13:32:27,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:32:27" (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 13:32:28,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 13:32:28,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 13:32:28,006 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 13:32:28,007 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 13:32:28,007 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 13:32:28,007 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 13:32:28,008 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 13:32:28,008 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 13:32:28,008 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 13:32:28,009 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 13:32:28,010 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 13:32:28,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 13:32:28,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 13:32:28,011 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 13:32:28,011 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 13:32:28,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 13:32:28,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 13:32:28,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 13:32:28,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 13:32:28,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 13:32:28,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 13:32:37,972 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 13:32:37,972 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 13:32:37,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:32:37 BoogieIcfgContainer [2020-10-28 13:32:37,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 13:32:37,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 13:32:37,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 13:32:37,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 13:32:37,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 01:32:25" (1/3) ... [2020-10-28 13:32:37,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35121f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:32:37, skipping insertion in model container [2020-10-28 13:32:37,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:32:27" (2/3) ... [2020-10-28 13:32:37,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35121f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:32:37, skipping insertion in model container [2020-10-28 13:32:37,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:32:37" (3/3) ... [2020-10-28 13:32:37,991 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label11.c [2020-10-28 13:32:38,004 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 13:32:38,011 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 13:32:38,025 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 13:32:38,072 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 13:32:38,072 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 13:32:38,072 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 13:32:38,072 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 13:32:38,072 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 13:32:38,073 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 13:32:38,073 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 13:32:38,073 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 13:32:38,113 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-28 13:32:38,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 13:32:38,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:32:38,124 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] [2020-10-28 13:32:38,124 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:32:38,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:32:38,131 INFO L82 PathProgramCache]: Analyzing trace with hash -453671637, now seen corresponding path program 1 times [2020-10-28 13:32:38,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:32:38,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075771819] [2020-10-28 13:32:38,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:32:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:32:38,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:32:39,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:32:39,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 13:32:39,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:32:39,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 950 [2020-10-28 13:32:39,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:32:39,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:32:39,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:32:39,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:32:39,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 13:32:39,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 13:32:39,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:32:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:32:39,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:32:39,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:32:39,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:32:39,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:32:39,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 13:32:39,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:32:39,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:32:39,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:32:39,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:32:39,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:32:39,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:32:39,706 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 13:32:39,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075771819] [2020-10-28 13:32:39,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:32:39,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 13:32:39,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824471062] [2020-10-28 13:32:39,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 13:32:39,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:32:39,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 13:32:39,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 13:32:39,744 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-28 13:32:55,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:32:55,785 INFO L93 Difference]: Finished difference Result 1695 states and 3092 transitions. [2020-10-28 13:32:55,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:32:55,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-28 13:32:55,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:32:55,817 INFO L225 Difference]: With dead ends: 1695 [2020-10-28 13:32:55,817 INFO L226 Difference]: Without dead ends: 1011 [2020-10-28 13:32:55,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:32:55,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2020-10-28 13:32:55,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 1004. [2020-10-28 13:32:55,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1004 states. [2020-10-28 13:32:55,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1500 transitions. [2020-10-28 13:32:55,996 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1500 transitions. Word has length 63 [2020-10-28 13:32:55,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:32:55,997 INFO L481 AbstractCegarLoop]: Abstraction has 1004 states and 1500 transitions. [2020-10-28 13:32:55,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 13:32:55,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1500 transitions. [2020-10-28 13:32:56,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-28 13:32:56,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:32:56,006 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 13:32:56,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 13:32:56,006 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:32:56,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:32:56,007 INFO L82 PathProgramCache]: Analyzing trace with hash -2043828897, now seen corresponding path program 1 times [2020-10-28 13:32:56,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:32:56,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695320669] [2020-10-28 13:32:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:32:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:32:56,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:32:56,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:32:57,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:01,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:01,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-28 13:33:01,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:33:01,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 13:33:01,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:01,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:01,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:33:01,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-28 13:33:01,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 13:33:01,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 13:33:01,319 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 13:33:01,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:33:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:01,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:01,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:01,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:33:01,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:33:01,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 13:33:01,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:01,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:01,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:33:01,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:33:01,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:33:01,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-10-28 13:33:01,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:33:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:01,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:01,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:01,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 13:33:01,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:33:01,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-28 13:33:01,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:01,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:01,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:33:01,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:33:01,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 13:33:01,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:33:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:33:01,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695320669] [2020-10-28 13:33:01,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:33:01,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:33:01,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047754213] [2020-10-28 13:33:01,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:33:01,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:33:01,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:33:01,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:33:01,727 INFO L87 Difference]: Start difference. First operand 1004 states and 1500 transitions. Second operand 5 states. [2020-10-28 13:33:19,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:33:19,151 INFO L93 Difference]: Finished difference Result 2907 states and 4387 transitions. [2020-10-28 13:33:19,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:33:19,153 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2020-10-28 13:33:19,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:33:19,168 INFO L225 Difference]: With dead ends: 2907 [2020-10-28 13:33:19,169 INFO L226 Difference]: Without dead ends: 1909 [2020-10-28 13:33:19,173 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 13:33:19,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2020-10-28 13:33:19,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1899. [2020-10-28 13:33:19,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1899 states. [2020-10-28 13:33:19,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 2588 transitions. [2020-10-28 13:33:19,293 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 2588 transitions. Word has length 137 [2020-10-28 13:33:19,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:33:19,294 INFO L481 AbstractCegarLoop]: Abstraction has 1899 states and 2588 transitions. [2020-10-28 13:33:19,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:33:19,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 2588 transitions. [2020-10-28 13:33:19,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-28 13:33:19,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:33:19,300 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:33:19,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 13:33:19,301 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:33:19,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:33:19,302 INFO L82 PathProgramCache]: Analyzing trace with hash -2000449998, now seen corresponding path program 1 times [2020-10-28 13:33:19,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:33:19,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289603815] [2020-10-28 13:33:19,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:33:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:19,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:19,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:19,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:20,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:21,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:21,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:21,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-28 13:33:21,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 13:33:21,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2460 [2020-10-28 13:33:21,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:21,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:21,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:33:21,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-10-28 13:33:21,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:33:21,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:33:21,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:33:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:21,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:21,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:21,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:33:21,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:33:21,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 13:33:21,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:21,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:21,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:33:21,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:33:21,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:33:21,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:33:21,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:33:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:22,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:22,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:22,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 13:33:22,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:33:22,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-28 13:33:22,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:22,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:22,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:33:22,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 13:33:22,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:33:22,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:33:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:33:22,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289603815] [2020-10-28 13:33:22,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:33:22,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 13:33:22,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893599194] [2020-10-28 13:33:22,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:33:22,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:33:22,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:33:22,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:33:22,274 INFO L87 Difference]: Start difference. First operand 1899 states and 2588 transitions. Second operand 5 states. [2020-10-28 13:33:37,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:33:37,385 INFO L93 Difference]: Finished difference Result 4238 states and 6005 transitions. [2020-10-28 13:33:37,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:33:37,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2020-10-28 13:33:37,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:33:37,402 INFO L225 Difference]: With dead ends: 4238 [2020-10-28 13:33:37,402 INFO L226 Difference]: Without dead ends: 2345 [2020-10-28 13:33:37,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:33:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2020-10-28 13:33:37,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 1904. [2020-10-28 13:33:37,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1904 states. [2020-10-28 13:33:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 2592 transitions. [2020-10-28 13:33:37,481 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 2592 transitions. Word has length 159 [2020-10-28 13:33:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:33:37,482 INFO L481 AbstractCegarLoop]: Abstraction has 1904 states and 2592 transitions. [2020-10-28 13:33:37,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:33:37,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 2592 transitions. [2020-10-28 13:33:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-28 13:33:37,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:33:37,486 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 13:33:37,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 13:33:37,487 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:33:37,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:33:37,488 INFO L82 PathProgramCache]: Analyzing trace with hash -860287651, now seen corresponding path program 1 times [2020-10-28 13:33:37,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:33:37,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914508924] [2020-10-28 13:33:37,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:33:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:37,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:37,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:39,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:39,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-28 13:33:39,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:33:39,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2323 [2020-10-28 13:33:39,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:39,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:39,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:33:39,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:33:39,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-28 13:33:39,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:33:40,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:33:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:40,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:40,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:40,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:33:40,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:33:40,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 13:33:40,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:40,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:40,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:33:40,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:33:40,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:33:40,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:33:40,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:33:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:40,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:40,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:40,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 13:33:40,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:33:40,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-28 13:33:40,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:40,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:40,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:33:40,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:33:40,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-28 13:33:40,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 13:33:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:33:40,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914508924] [2020-10-28 13:33:40,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:33:40,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 13:33:40,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558424694] [2020-10-28 13:33:40,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:33:40,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:33:40,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:33:40,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:33:40,629 INFO L87 Difference]: Start difference. First operand 1904 states and 2592 transitions. Second operand 7 states. [2020-10-28 13:33:56,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:33:56,502 INFO L93 Difference]: Finished difference Result 4290 states and 5801 transitions. [2020-10-28 13:33:56,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:33:56,506 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 172 [2020-10-28 13:33:56,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:33:56,520 INFO L225 Difference]: With dead ends: 4290 [2020-10-28 13:33:56,521 INFO L226 Difference]: Without dead ends: 2392 [2020-10-28 13:33:56,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-28 13:33:56,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2020-10-28 13:33:56,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2362. [2020-10-28 13:33:56,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2362 states. [2020-10-28 13:33:56,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 3081 transitions. [2020-10-28 13:33:56,601 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 3081 transitions. Word has length 172 [2020-10-28 13:33:56,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:33:56,602 INFO L481 AbstractCegarLoop]: Abstraction has 2362 states and 3081 transitions. [2020-10-28 13:33:56,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:33:56,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 3081 transitions. [2020-10-28 13:33:56,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-28 13:33:56,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:33:56,605 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 13:33:56,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 13:33:56,606 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:33:56,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:33:56,607 INFO L82 PathProgramCache]: Analyzing trace with hash 366196841, now seen corresponding path program 1 times [2020-10-28 13:33:56,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:33:56,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733758294] [2020-10-28 13:33:56,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:33:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:56,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:56,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:57,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:57,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-28 13:33:57,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:33:57,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1347 [2020-10-28 13:33:57,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:57,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:58,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:33:58,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:33:58,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-28 13:33:58,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:33:58,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:33:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:58,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:58,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:58,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:33:58,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:33:58,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 13:33:58,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:58,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:33:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:33:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:33:58,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:33:58,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:33:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:33:58,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:33:58,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:33:58,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 13:33:58,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:33:58,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-28 13:33:58,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:33:58,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:33:58,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:33:58,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:33:58,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-28 13:33:58,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:33:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:33:58,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733758294] [2020-10-28 13:33:58,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:33:58,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 13:33:58,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885528625] [2020-10-28 13:33:58,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:33:58,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:33:58,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:33:58,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:33:58,629 INFO L87 Difference]: Start difference. First operand 2362 states and 3081 transitions. Second operand 7 states. [2020-10-28 13:34:13,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:34:13,914 INFO L93 Difference]: Finished difference Result 6208 states and 8437 transitions. [2020-10-28 13:34:13,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:34:13,915 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 178 [2020-10-28 13:34:13,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:34:13,932 INFO L225 Difference]: With dead ends: 6208 [2020-10-28 13:34:13,932 INFO L226 Difference]: Without dead ends: 3375 [2020-10-28 13:34:13,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:34:13,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-10-28 13:34:14,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2869. [2020-10-28 13:34:14,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2869 states. [2020-10-28 13:34:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2869 states to 2869 states and 3452 transitions. [2020-10-28 13:34:14,071 INFO L78 Accepts]: Start accepts. Automaton has 2869 states and 3452 transitions. Word has length 178 [2020-10-28 13:34:14,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:34:14,072 INFO L481 AbstractCegarLoop]: Abstraction has 2869 states and 3452 transitions. [2020-10-28 13:34:14,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:34:14,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2869 states and 3452 transitions. [2020-10-28 13:34:14,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-28 13:34:14,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:34:14,077 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 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 13:34:14,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 13:34:14,077 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:34:14,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:34:14,078 INFO L82 PathProgramCache]: Analyzing trace with hash 2143225743, now seen corresponding path program 1 times [2020-10-28 13:34:14,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:34:14,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622375996] [2020-10-28 13:34:14,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:34:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:34:14,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:14,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:15,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:34:15,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-28 13:34:15,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:34:15,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1265 [2020-10-28 13:34:15,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:34:15,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:34:15,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:34:15,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 13:34:15,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 13:34:15,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:34:15,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:34:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:34:15,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:15,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:34:15,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:34:15,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:34:15,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:34:15,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:34:15,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:34:15,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:34:15,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:34:15,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:34:15,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:34:15,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:34:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:34:15,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:15,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:34:15,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:34:15,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:34:15,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-28 13:34:15,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:34:15,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:34:15,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:34:15,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:34:15,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 13:34:15,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:34:15,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:34:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:34:15,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:15,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:34:15,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 13:34:15,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:34:15,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-28 13:34:15,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:34:15,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:34:15,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:34:15,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:34:15,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 13:34:15,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:34:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:34:16,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622375996] [2020-10-28 13:34:16,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:34:16,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:34:16,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682352623] [2020-10-28 13:34:16,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:34:16,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:34:16,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:34:16,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:34:16,103 INFO L87 Difference]: Start difference. First operand 2869 states and 3452 transitions. Second operand 7 states. [2020-10-28 13:34:33,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:34:33,087 INFO L93 Difference]: Finished difference Result 7954 states and 9804 transitions. [2020-10-28 13:34:33,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:34:33,089 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 223 [2020-10-28 13:34:33,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:34:33,113 INFO L225 Difference]: With dead ends: 7954 [2020-10-28 13:34:33,114 INFO L226 Difference]: Without dead ends: 5091 [2020-10-28 13:34:33,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 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 13:34:33,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5091 states. [2020-10-28 13:34:33,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5091 to 4643. [2020-10-28 13:34:33,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4643 states. [2020-10-28 13:34:33,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 5588 transitions. [2020-10-28 13:34:33,260 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 5588 transitions. Word has length 223 [2020-10-28 13:34:33,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:34:33,261 INFO L481 AbstractCegarLoop]: Abstraction has 4643 states and 5588 transitions. [2020-10-28 13:34:33,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:34:33,261 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 5588 transitions. [2020-10-28 13:34:33,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-28 13:34:33,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:34:33,266 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 13:34:33,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 13:34:33,267 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:34:33,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:34:33,267 INFO L82 PathProgramCache]: Analyzing trace with hash -297089165, now seen corresponding path program 1 times [2020-10-28 13:34:33,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:34:33,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288969766] [2020-10-28 13:34:33,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:34:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:34:33,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:33,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:33,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:38,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:34:38,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-28 13:34:38,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:34:38,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4991 [2020-10-28 13:34:38,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:34:38,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:34:38,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:34:38,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-10-28 13:34:38,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 13:34:38,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:34:38,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:34:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:34:38,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:38,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:34:38,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:34:38,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:34:38,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 13:34:38,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:34:38,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:34:38,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:34:38,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:34:38,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:34:38,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:34:38,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:34:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:34:38,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:38,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:34:38,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:34:38,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:34:38,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 13:34:38,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:34:38,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:34:38,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:34:38,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:34:38,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:34:38,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:34:38,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:34:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:34:38,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:34:38,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:34:38,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 13:34:38,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:34:38,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-28 13:34:38,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:34:38,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:34:38,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:34:38,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:34:38,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 13:34:38,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:34:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-28 13:34:38,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288969766] [2020-10-28 13:34:38,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:34:38,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:34:38,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533251304] [2020-10-28 13:34:38,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:34:38,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:34:38,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:34:38,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:34:38,954 INFO L87 Difference]: Start difference. First operand 4643 states and 5588 transitions. Second operand 5 states. [2020-10-28 13:34:39,651 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 13:34:59,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:34:59,833 INFO L93 Difference]: Finished difference Result 11985 states and 14705 transitions. [2020-10-28 13:34:59,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:34:59,836 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-10-28 13:34:59,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:34:59,867 INFO L225 Difference]: With dead ends: 11985 [2020-10-28 13:34:59,867 INFO L226 Difference]: Without dead ends: 6435 [2020-10-28 13:34:59,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 13:34:59,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6435 states. [2020-10-28 13:35:00,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6435 to 6420. [2020-10-28 13:35:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6420 states. [2020-10-28 13:35:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6420 states to 6420 states and 7820 transitions. [2020-10-28 13:35:00,056 INFO L78 Accepts]: Start accepts. Automaton has 6420 states and 7820 transitions. Word has length 225 [2020-10-28 13:35:00,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:35:00,056 INFO L481 AbstractCegarLoop]: Abstraction has 6420 states and 7820 transitions. [2020-10-28 13:35:00,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:35:00,057 INFO L276 IsEmpty]: Start isEmpty. Operand 6420 states and 7820 transitions. [2020-10-28 13:35:00,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-28 13:35:00,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:35:00,061 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:35:00,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 13:35:00,062 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:35:00,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:35:00,063 INFO L82 PathProgramCache]: Analyzing trace with hash 908286525, now seen corresponding path program 1 times [2020-10-28 13:35:00,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:35:00,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91903800] [2020-10-28 13:35:00,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:35:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:35:00,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:35:00,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:35:00,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:35:05,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:35:05,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-28 13:35:05,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:35:05,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 13:35:05,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:35:05,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:35:05,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:35:05,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 13:35:05,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-28 13:35:05,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:35:05,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:35:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:35:05,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:35:05,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:35:05,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:35:05,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:35:05,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 13:35:05,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:35:05,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:35:05,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:35:05,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:35:05,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:35:05,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:35:05,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:35:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:35:05,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:35:05,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:35:05,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:35:05,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:35:05,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-28 13:35:05,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:35:05,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:35:05,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:35:05,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:35:05,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 13:35:05,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:35:05,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:35:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:35:05,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:35:05,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:35:05,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:35:05,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 13:35:05,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:35:05,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-28 13:35:05,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:35:05,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:35:05,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:35:05,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:35:05,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:35:05,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:35:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-28 13:35:05,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91903800] [2020-10-28 13:35:05,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:35:05,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:35:05,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159146493] [2020-10-28 13:35:05,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:35:05,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:35:05,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:35:05,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:35:05,911 INFO L87 Difference]: Start difference. First operand 6420 states and 7820 transitions. Second operand 5 states. [2020-10-28 13:35:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:35:20,045 INFO L93 Difference]: Finished difference Result 13273 states and 16401 transitions. [2020-10-28 13:35:20,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:35:20,048 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 236 [2020-10-28 13:35:20,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:35:20,082 INFO L225 Difference]: With dead ends: 13273 [2020-10-28 13:35:20,082 INFO L226 Difference]: Without dead ends: 6859 [2020-10-28 13:35:20,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 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 13:35:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6859 states. [2020-10-28 13:35:20,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6859 to 6422. [2020-10-28 13:35:20,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6422 states. [2020-10-28 13:35:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6422 states to 6422 states and 7903 transitions. [2020-10-28 13:35:20,271 INFO L78 Accepts]: Start accepts. Automaton has 6422 states and 7903 transitions. Word has length 236 [2020-10-28 13:35:20,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:35:20,272 INFO L481 AbstractCegarLoop]: Abstraction has 6422 states and 7903 transitions. [2020-10-28 13:35:20,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:35:20,272 INFO L276 IsEmpty]: Start isEmpty. Operand 6422 states and 7903 transitions. [2020-10-28 13:35:20,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-28 13:35:20,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:35:20,279 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:35:20,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 13:35:20,280 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:35:20,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:35:20,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1305266996, now seen corresponding path program 1 times [2020-10-28 13:35:20,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:35:20,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212899249] [2020-10-28 13:35:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:35:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:35:20,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:35:20,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:35:21,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:35:24,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:35:24,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 305 [2020-10-28 13:35:24,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:35:24,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4420 [2020-10-28 13:35:24,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:35:24,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:35:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:35:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 240 [2020-10-28 13:35:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 13:35:24,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:35:25,063 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 13:35:25,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:35:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:35:25,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:35:25,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:35:25,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:35:25,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:35:25,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 13:35:25,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:35:25,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:35:25,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:35:25,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:35:25,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:35:25,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:35:25,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:35:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:35:25,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:35:25,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:35:25,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:35:25,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:35:25,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 13:35:25,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:35:25,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:35:25,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:35:25,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:35:25,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:35:25,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:35:25,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:35:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:35:25,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:35:25,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:35:25,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-28 13:35:25,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:35:25,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-10-28 13:35:25,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:35:25,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:35:25,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:35:25,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:35:25,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-28 13:35:25,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:35:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-28 13:35:25,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212899249] [2020-10-28 13:35:25,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:35:25,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:35:25,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656105416] [2020-10-28 13:35:25,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:35:25,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:35:25,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:35:25,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:35:25,670 INFO L87 Difference]: Start difference. First operand 6422 states and 7903 transitions. Second operand 5 states. [2020-10-28 13:35:42,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:35:42,367 INFO L93 Difference]: Finished difference Result 14168 states and 17411 transitions. [2020-10-28 13:35:42,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:35:42,372 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 291 [2020-10-28 13:35:42,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:35:42,404 INFO L225 Difference]: With dead ends: 14168 [2020-10-28 13:35:42,404 INFO L226 Difference]: Without dead ends: 7752 [2020-10-28 13:35:42,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 13:35:42,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7752 states. [2020-10-28 13:35:42,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7752 to 7304. [2020-10-28 13:35:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-10-28 13:35:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 8930 transitions. [2020-10-28 13:35:42,614 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 8930 transitions. Word has length 291 [2020-10-28 13:35:42,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:35:42,616 INFO L481 AbstractCegarLoop]: Abstraction has 7304 states and 8930 transitions. [2020-10-28 13:35:42,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:35:42,616 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 8930 transitions. [2020-10-28 13:35:42,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-28 13:35:42,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:35:42,623 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:35:42,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 13:35:42,624 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:35:42,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:35:42,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1893457384, now seen corresponding path program 1 times [2020-10-28 13:35:42,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:35:42,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339230819] [2020-10-28 13:35:42,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:35:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:35:42,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:35:43,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:35:43,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-28 13:35:43,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:35:43,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 713 [2020-10-28 13:35:43,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:35:43,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:35:43,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:35:43,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-28 13:35:43,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 13:35:43,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:35:43,691 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 13:35:43,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:35:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:35:43,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:35:43,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:35:43,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:35:43,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:35:43,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:35:43,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:35:43,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:35:43,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:35:43,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:35:43,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:35:43,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:35:43,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:35:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:35:43,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:35:43,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:35:43,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 13:35:43,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:35:43,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 13:35:43,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:35:43,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:35:43,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:35:43,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:35:43,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:35:43,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:35:43,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 13:35:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:35:43,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:35:43,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:35:43,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 13:35:43,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:35:43,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-28 13:35:43,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:35:43,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:35:43,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:35:43,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:35:43,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:35:43,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:35:43,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-28 13:35:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:35:44,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:35:44,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:35:44,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 13:35:44,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:35:44,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-28 13:35:44,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:35:44,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:35:44,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:35:44,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:35:44,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 13:35:44,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:35:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 306 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-28 13:35:44,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339230819] [2020-10-28 13:35:44,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:35:44,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:35:44,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844393471] [2020-10-28 13:35:44,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:35:44,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:35:44,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:35:44,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:35:44,390 INFO L87 Difference]: Start difference. First operand 7304 states and 8930 transitions. Second operand 7 states. [2020-10-28 13:35:52,602 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 13:36:08,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:36:08,264 INFO L93 Difference]: Finished difference Result 17523 states and 21744 transitions. [2020-10-28 13:36:08,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:36:08,269 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 307 [2020-10-28 13:36:08,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:36:08,301 INFO L225 Difference]: With dead ends: 17523 [2020-10-28 13:36:08,301 INFO L226 Difference]: Without dead ends: 9296 [2020-10-28 13:36:08,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:36:08,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9296 states. [2020-10-28 13:36:08,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9296 to 8326. [2020-10-28 13:36:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8326 states. [2020-10-28 13:36:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8326 states to 8326 states and 10283 transitions. [2020-10-28 13:36:08,559 INFO L78 Accepts]: Start accepts. Automaton has 8326 states and 10283 transitions. Word has length 307 [2020-10-28 13:36:08,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:36:08,560 INFO L481 AbstractCegarLoop]: Abstraction has 8326 states and 10283 transitions. [2020-10-28 13:36:08,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:36:08,560 INFO L276 IsEmpty]: Start isEmpty. Operand 8326 states and 10283 transitions. [2020-10-28 13:36:08,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-10-28 13:36:08,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:36:08,572 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:36:08,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 13:36:08,572 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:36:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:36:08,573 INFO L82 PathProgramCache]: Analyzing trace with hash -172513193, now seen corresponding path program 1 times [2020-10-28 13:36:08,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:36:08,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341054162] [2020-10-28 13:36:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:36:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:36:08,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:36:08,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking...