/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/loop-acceleration/simple_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:37:41,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:37:41,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:37:41,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:37:41,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:37:41,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:37:41,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:37:41,869 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:37:41,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:37:41,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:37:41,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:37:41,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:37:41,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:37:41,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:37:41,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:37:41,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:37:41,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:37:41,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:37:41,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:37:41,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:37:41,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:37:41,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:37:41,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:37:41,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:37:41,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:37:41,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:37:41,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:37:41,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:37:41,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:37:41,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:37:41,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:37:41,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:37:41,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:37:41,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:37:41,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:37:41,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:37:41,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:37:41,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:37:41,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:37:41,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:37:41,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:37:41,940 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 [2020-10-29 09:37:42,000 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:37:42,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:37:42,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:37:42,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:37:42,006 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:37:42,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:37:42,007 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:37:42,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:37:42,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:37:42,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:37:42,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:37:42,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:37:42,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:37:42,009 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:37:42,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:37:42,010 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:37:42,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:37:42,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:37:42,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:37:42,012 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:37:42,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:37:42,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:37:42,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:37:42,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:37:42,013 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:37:42,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:37:42,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:37:42,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:37:42,014 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:37:42,015 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:37:42,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:37:42,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:37:42,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:37:42,497 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:37:42,498 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:37:42,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_4-1.c [2020-10-29 09:37:42,588 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c652d827/ab1a281b8f814317aee5f36c03528fbe/FLAG091ade085 [2020-10-29 09:37:43,232 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:37:43,233 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_4-1.c [2020-10-29 09:37:43,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c652d827/ab1a281b8f814317aee5f36c03528fbe/FLAG091ade085 [2020-10-29 09:37:43,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c652d827/ab1a281b8f814317aee5f36c03528fbe [2020-10-29 09:37:43,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:37:43,586 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:37:43,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:37:43,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:37:43,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:37:43,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:37:43" (1/1) ... [2020-10-29 09:37:43,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12579b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:43, skipping insertion in model container [2020-10-29 09:37:43,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:37:43" (1/1) ... [2020-10-29 09:37:43,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:37:43,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:37:43,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:37:43,796 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:37:43,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:37:43,827 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:37:43,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:43 WrapperNode [2020-10-29 09:37:43,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:37:43,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:37:43,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:37:43,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:37:43,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:43" (1/1) ... [2020-10-29 09:37:43,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:43" (1/1) ... [2020-10-29 09:37:43,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:43" (1/1) ... [2020-10-29 09:37:43,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:43" (1/1) ... [2020-10-29 09:37:43,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:43" (1/1) ... [2020-10-29 09:37:43,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:43" (1/1) ... [2020-10-29 09:37:43,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:43" (1/1) ... [2020-10-29 09:37:43,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:37:43,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:37:43,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:37:43,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:37:43,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:43" (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 [2020-10-29 09:37:43,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:37:43,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:37:43,946 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:37:43,947 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:37:43,947 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:37:43,947 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:37:43,947 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:37:43,947 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:37:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:37:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:37:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:37:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:37:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:37:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:37:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:37:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:37:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:37:44,170 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:37:44,170 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:37:44,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:37:44 BoogieIcfgContainer [2020-10-29 09:37:44,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:37:44,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:37:44,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:37:44,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:37:44,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:37:43" (1/3) ... [2020-10-29 09:37:44,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d5e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:37:44, skipping insertion in model container [2020-10-29 09:37:44,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:43" (2/3) ... [2020-10-29 09:37:44,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d5e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:37:44, skipping insertion in model container [2020-10-29 09:37:44,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:37:44" (3/3) ... [2020-10-29 09:37:44,181 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_4-1.c [2020-10-29 09:37:44,195 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:37:44,199 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:37:44,214 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:37:44,242 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:37:44,243 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:37:44,243 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:37:44,243 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:37:44,243 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:37:44,243 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:37:44,244 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:37:44,244 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:37:44,274 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-29 09:37:44,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:37:44,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:44,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:44,319 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:44,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:44,336 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-29 09:37:44,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:44,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566541881] [2020-10-29 09:37:44,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:44,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:44,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:44,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:37:44,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:44,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-29 09:37:44,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:44,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:37:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:44,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:37:44,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:44,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:44,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:44,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:44,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:44,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 09:37:44,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:44,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:44,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:44,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:44,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:44,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:44,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566541881] [2020-10-29 09:37:44,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:37:44,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 09:37:44,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461950332] [2020-10-29 09:37:44,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 09:37:44,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:44,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 09:37:44,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:37:44,830 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-29 09:37:44,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:44,898 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-29 09:37:44,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 09:37:44,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-29 09:37:44,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:44,908 INFO L225 Difference]: With dead ends: 34 [2020-10-29 09:37:44,908 INFO L226 Difference]: Without dead ends: 13 [2020-10-29 09:37:44,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:37:44,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-29 09:37:44,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-29 09:37:44,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-29 09:37:44,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-29 09:37:44,957 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-10-29 09:37:44,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:44,957 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-29 09:37:44,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 09:37:44,958 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-29 09:37:44,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:37:44,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:44,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:44,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:37:44,959 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:44,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:44,961 INFO L82 PathProgramCache]: Analyzing trace with hash 669071831, now seen corresponding path program 1 times [2020-10-29 09:37:44,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:44,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145628291] [2020-10-29 09:37:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:45,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:45,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:45,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:37:45,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:45,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-29 09:37:45,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:45,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:45,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:37:45,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:45,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:37:45,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:45,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:45,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:45,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:45,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:45,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:45,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 09:37:45,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:45,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:45,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:45,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:45,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:45,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:37:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:45,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145628291] [2020-10-29 09:37:45,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:37:45,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:37:45,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789014654] [2020-10-29 09:37:45,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:37:45,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:45,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:37:45,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:37:45,331 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-29 09:37:45,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:45,419 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-29 09:37:45,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:37:45,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-29 09:37:45,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:45,421 INFO L225 Difference]: With dead ends: 20 [2020-10-29 09:37:45,421 INFO L226 Difference]: Without dead ends: 14 [2020-10-29 09:37:45,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:37:45,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-29 09:37:45,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-29 09:37:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-29 09:37:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-29 09:37:45,430 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-29 09:37:45,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:45,431 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-29 09:37:45,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:37:45,431 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-29 09:37:45,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-29 09:37:45,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:45,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:45,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:37:45,432 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:45,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:45,433 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-29 09:37:45,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:45,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241261317] [2020-10-29 09:37:45,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:45,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:45,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:45,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:37:45,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:45,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-29 09:37:45,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:45,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:37:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:45,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 09:37:45,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:45,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:45,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:45,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:45,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:45,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:45,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:37:45,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:45,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:45,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:45,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:45,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:45,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:45,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241261317] [2020-10-29 09:37:45,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:45,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:37:45,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172954051] [2020-10-29 09:37:45,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:37:45,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:45,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:37:45,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:37:45,655 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-10-29 09:37:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:45,790 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-29 09:37:45,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:37:45,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-29 09:37:45,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:45,791 INFO L225 Difference]: With dead ends: 21 [2020-10-29 09:37:45,791 INFO L226 Difference]: Without dead ends: 15 [2020-10-29 09:37:45,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:37:45,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-29 09:37:45,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-29 09:37:45,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-29 09:37:45,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-29 09:37:45,800 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-29 09:37:45,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:45,800 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-29 09:37:45,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:37:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-29 09:37:45,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-29 09:37:45,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:45,801 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:45,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:37:45,802 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:45,803 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-29 09:37:45,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:45,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457524345] [2020-10-29 09:37:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:45,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:45,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:45,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:37:45,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:45,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-29 09:37:45,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:45,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:45,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:37:45,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:45,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:37:45,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:46,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:46,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:46,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:46,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:46,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:46,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:37:46,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:46,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:46,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:46,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:46,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:46,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:46,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457524345] [2020-10-29 09:37:46,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:46,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:37:46,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744143748] [2020-10-29 09:37:46,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:37:46,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:46,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:37:46,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:37:46,032 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-10-29 09:37:46,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:46,233 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-29 09:37:46,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:37:46,233 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-29 09:37:46,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:46,234 INFO L225 Difference]: With dead ends: 22 [2020-10-29 09:37:46,235 INFO L226 Difference]: Without dead ends: 16 [2020-10-29 09:37:46,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:37:46,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-29 09:37:46,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-29 09:37:46,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-29 09:37:46,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-29 09:37:46,246 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-29 09:37:46,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:46,247 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-29 09:37:46,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:37:46,248 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-29 09:37:46,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:37:46,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:46,249 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:46,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:37:46,250 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:46,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:46,253 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-29 09:37:46,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:46,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739893577] [2020-10-29 09:37:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:46,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:46,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:46,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:37:46,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:46,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-29 09:37:46,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:46,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:46,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:37:46,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:46,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:37:46,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:46,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:46,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:46,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:46,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:46,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:46,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:46,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:37:46,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:46,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:46,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:46,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:46,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:46,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:46,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739893577] [2020-10-29 09:37:46,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:46,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:37:46,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271501941] [2020-10-29 09:37:46,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:37:46,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:46,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:37:46,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:37:46,590 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2020-10-29 09:37:46,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:46,808 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-29 09:37:46,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:37:46,809 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-29 09:37:46,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:46,809 INFO L225 Difference]: With dead ends: 23 [2020-10-29 09:37:46,809 INFO L226 Difference]: Without dead ends: 17 [2020-10-29 09:37:46,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:37:46,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-29 09:37:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-29 09:37:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-29 09:37:46,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-29 09:37:46,820 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-29 09:37:46,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:46,821 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-29 09:37:46,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:37:46,821 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-29 09:37:46,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:37:46,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:46,822 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:46,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:37:46,822 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:46,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:46,823 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-29 09:37:46,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:46,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900737249] [2020-10-29 09:37:46,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:46,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:47,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:47,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:37:47,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:47,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-29 09:37:47,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:47,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:47,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:37:47,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:47,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:37:47,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:47,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:47,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:47,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:47,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:47,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:47,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:37:47,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:47,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:47,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:47,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:47,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:47,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:47,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900737249] [2020-10-29 09:37:47,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:47,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:37:47,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452628060] [2020-10-29 09:37:47,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:37:47,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:47,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:37:47,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:37:47,157 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-10-29 09:37:47,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:47,383 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-29 09:37:47,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:37:47,385 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-29 09:37:47,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:47,385 INFO L225 Difference]: With dead ends: 24 [2020-10-29 09:37:47,385 INFO L226 Difference]: Without dead ends: 18 [2020-10-29 09:37:47,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:37:47,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-29 09:37:47,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-29 09:37:47,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-29 09:37:47,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-29 09:37:47,399 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-29 09:37:47,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:47,399 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-29 09:37:47,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:37:47,400 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-29 09:37:47,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:37:47,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:47,400 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:47,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:37:47,401 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:47,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:47,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-29 09:37:47,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:47,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926879289] [2020-10-29 09:37:47,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:47,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:47,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:47,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:37:47,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:47,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-29 09:37:47,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:47,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:47,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:37:47,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:47,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:37:47,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:47,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:47,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:47,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:47,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:47,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:47,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:37:47,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:47,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:47,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:47,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:47,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:47,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:47,843 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:47,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926879289] [2020-10-29 09:37:47,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:47,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:37:47,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780470580] [2020-10-29 09:37:47,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:37:47,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:47,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:37:47,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:37:47,847 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-29 09:37:48,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:48,126 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-29 09:37:48,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:37:48,127 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-29 09:37:48,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:48,128 INFO L225 Difference]: With dead ends: 25 [2020-10-29 09:37:48,128 INFO L226 Difference]: Without dead ends: 19 [2020-10-29 09:37:48,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:37:48,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-29 09:37:48,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-29 09:37:48,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-29 09:37:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-29 09:37:48,139 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-29 09:37:48,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:48,140 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-29 09:37:48,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:37:48,140 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-29 09:37:48,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:37:48,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:48,141 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:48,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:37:48,141 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:48,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:48,142 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-29 09:37:48,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:48,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413761936] [2020-10-29 09:37:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:48,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:48,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:48,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:37:48,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:48,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-29 09:37:48,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:48,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:48,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:37:48,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:48,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:37:48,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:48,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:48,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:48,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:48,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:48,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:48,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:37:48,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:48,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:48,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:48,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:48,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:48,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:48,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413761936] [2020-10-29 09:37:48,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:48,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:37:48,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719962181] [2020-10-29 09:37:48,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:37:48,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:48,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:37:48,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:37:48,533 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-10-29 09:37:48,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:48,921 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-29 09:37:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:37:48,921 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-29 09:37:48,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:48,922 INFO L225 Difference]: With dead ends: 26 [2020-10-29 09:37:48,922 INFO L226 Difference]: Without dead ends: 20 [2020-10-29 09:37:48,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:37:48,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-29 09:37:48,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-29 09:37:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-29 09:37:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-29 09:37:48,939 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-29 09:37:48,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:48,940 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-29 09:37:48,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:37:48,940 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-29 09:37:48,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:37:48,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:48,941 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:48,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:37:48,942 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:48,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:48,943 INFO L82 PathProgramCache]: Analyzing trace with hash 611230302, now seen corresponding path program 7 times [2020-10-29 09:37:48,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:48,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215817879] [2020-10-29 09:37:48,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:48,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:49,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:49,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:37:49,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:49,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-29 09:37:49,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:49,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:49,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:37:49,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:49,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:37:49,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:49,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:49,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:49,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:49,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:49,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:49,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:37:49,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:49,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:49,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:49,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:49,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:49,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:49,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215817879] [2020-10-29 09:37:49,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:49,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:37:49,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392559518] [2020-10-29 09:37:49,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:37:49,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:49,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:37:49,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:37:49,395 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2020-10-29 09:37:49,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:49,824 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-29 09:37:49,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:37:49,825 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-29 09:37:49,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:49,826 INFO L225 Difference]: With dead ends: 27 [2020-10-29 09:37:49,826 INFO L226 Difference]: Without dead ends: 21 [2020-10-29 09:37:49,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:37:49,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-29 09:37:49,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-29 09:37:49,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-29 09:37:49,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-29 09:37:49,839 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-29 09:37:49,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:49,839 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-29 09:37:49,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:37:49,840 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-29 09:37:49,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:37:49,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:49,840 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:49,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:37:49,841 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:49,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:49,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1396409001, now seen corresponding path program 8 times [2020-10-29 09:37:49,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:49,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766812806] [2020-10-29 09:37:49,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:49,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:50,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:50,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:37:50,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:50,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-29 09:37:50,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:50,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:50,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:37:50,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:50,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:37:50,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:50,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:50,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:50,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:50,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:50,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:50,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:37:50,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:50,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:50,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:50,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:50,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:50,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:50,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766812806] [2020-10-29 09:37:50,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:50,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:37:50,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218684391] [2020-10-29 09:37:50,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:37:50,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:50,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:37:50,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:37:50,364 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2020-10-29 09:37:50,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:50,855 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-29 09:37:50,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:37:50,856 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-29 09:37:50,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:50,857 INFO L225 Difference]: With dead ends: 28 [2020-10-29 09:37:50,857 INFO L226 Difference]: Without dead ends: 22 [2020-10-29 09:37:50,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:37:50,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-29 09:37:50,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-29 09:37:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-29 09:37:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-29 09:37:50,869 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-29 09:37:50,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:50,871 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-29 09:37:50,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:37:50,871 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-29 09:37:50,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:37:50,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:50,872 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:50,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:37:50,873 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:50,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:50,873 INFO L82 PathProgramCache]: Analyzing trace with hash 791282046, now seen corresponding path program 9 times [2020-10-29 09:37:50,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:50,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112723573] [2020-10-29 09:37:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:50,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:51,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:51,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:37:51,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:51,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-29 09:37:51,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:51,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:51,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:37:51,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:51,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:37:51,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:51,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:51,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:51,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:51,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:51,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:51,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:37:51,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:51,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:51,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:51,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:51,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:51,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:51,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112723573] [2020-10-29 09:37:51,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:51,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:37:51,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725318329] [2020-10-29 09:37:51,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:37:51,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:51,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:37:51,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:37:51,421 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 13 states. [2020-10-29 09:37:52,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:52,049 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-29 09:37:52,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:37:52,050 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-29 09:37:52,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:52,051 INFO L225 Difference]: With dead ends: 29 [2020-10-29 09:37:52,051 INFO L226 Difference]: Without dead ends: 23 [2020-10-29 09:37:52,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:37:52,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-29 09:37:52,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-29 09:37:52,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-29 09:37:52,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-29 09:37:52,063 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-29 09:37:52,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:52,064 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-29 09:37:52,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:37:52,064 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-29 09:37:52,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:37:52,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:52,068 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:52,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:37:52,068 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:52,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:52,069 INFO L82 PathProgramCache]: Analyzing trace with hash -109772233, now seen corresponding path program 10 times [2020-10-29 09:37:52,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:52,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766084272] [2020-10-29 09:37:52,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:52,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:52,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:52,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:37:52,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:52,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-29 09:37:52,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:52,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:52,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:37:52,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:52,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:37:52,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:52,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:52,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:52,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:52,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:52,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:52,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:37:52,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:52,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:52,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:52,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:52,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:52,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:52,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766084272] [2020-10-29 09:37:52,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:52,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:37:52,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439042396] [2020-10-29 09:37:52,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:37:52,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:52,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:37:52,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:37:52,635 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 14 states. [2020-10-29 09:37:53,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:53,285 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-29 09:37:53,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:37:53,286 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-29 09:37:53,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:53,287 INFO L225 Difference]: With dead ends: 30 [2020-10-29 09:37:53,287 INFO L226 Difference]: Without dead ends: 24 [2020-10-29 09:37:53,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:37:53,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-29 09:37:53,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-29 09:37:53,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 09:37:53,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-29 09:37:53,294 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-29 09:37:53,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:53,295 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-29 09:37:53,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:37:53,295 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-29 09:37:53,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:37:53,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:53,296 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:53,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:37:53,296 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:53,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:53,297 INFO L82 PathProgramCache]: Analyzing trace with hash 2022316190, now seen corresponding path program 11 times [2020-10-29 09:37:53,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:53,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286082710] [2020-10-29 09:37:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:53,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:53,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:53,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:37:53,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:53,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-29 09:37:53,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:53,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:53,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:37:53,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:53,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:37:53,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:54,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:54,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:54,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:54,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:54,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:54,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:37:54,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:54,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:54,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:54,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:54,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:54,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:54,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286082710] [2020-10-29 09:37:54,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:54,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:37:54,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393080805] [2020-10-29 09:37:54,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:37:54,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:54,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:37:54,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:37:54,039 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 15 states. [2020-10-29 09:37:54,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:54,741 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-29 09:37:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:37:54,744 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-29 09:37:54,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:54,745 INFO L225 Difference]: With dead ends: 31 [2020-10-29 09:37:54,745 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 09:37:54,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:37:54,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 09:37:54,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-29 09:37:54,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-29 09:37:54,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-29 09:37:54,755 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-29 09:37:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:54,756 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-29 09:37:54,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:37:54,756 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-29 09:37:54,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:37:54,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:54,758 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:54,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:37:54,758 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:54,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:54,759 INFO L82 PathProgramCache]: Analyzing trace with hash -602419433, now seen corresponding path program 12 times [2020-10-29 09:37:54,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:54,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73548450] [2020-10-29 09:37:54,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:54,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:55,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:55,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:37:55,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:55,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-29 09:37:55,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:55,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:55,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:37:55,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:55,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:37:55,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:55,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:55,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:55,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:55,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:55,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:55,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:37:55,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:55,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:55,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:55,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:55,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:55,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:55,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73548450] [2020-10-29 09:37:55,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:55,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:37:55,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521357308] [2020-10-29 09:37:55,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:37:55,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:55,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:37:55,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:37:55,464 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 16 states. [2020-10-29 09:37:56,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:56,264 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-29 09:37:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:37:56,265 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-29 09:37:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:56,266 INFO L225 Difference]: With dead ends: 32 [2020-10-29 09:37:56,266 INFO L226 Difference]: Without dead ends: 26 [2020-10-29 09:37:56,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:37:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-29 09:37:56,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-29 09:37:56,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-29 09:37:56,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-29 09:37:56,275 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-29 09:37:56,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:56,275 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-29 09:37:56,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:37:56,276 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-29 09:37:56,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:37:56,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:56,276 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:56,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:37:56,277 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:56,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:56,277 INFO L82 PathProgramCache]: Analyzing trace with hash -364845122, now seen corresponding path program 13 times [2020-10-29 09:37:56,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:56,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404681468] [2020-10-29 09:37:56,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:56,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:56,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:56,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:37:56,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:56,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 579 [2020-10-29 09:37:56,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:56,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:56,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:37:56,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:56,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:37:56,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:57,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:57,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:57,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:57,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:57,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:57,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:37:57,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:57,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:57,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:57,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:57,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:57,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:57,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404681468] [2020-10-29 09:37:57,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:57,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:37:57,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414444996] [2020-10-29 09:37:57,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:37:57,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:57,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:37:57,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:37:57,190 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 17 states. [2020-10-29 09:37:58,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:58,016 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-29 09:37:58,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:37:58,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-29 09:37:58,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:58,017 INFO L225 Difference]: With dead ends: 33 [2020-10-29 09:37:58,017 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 09:37:58,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:37:58,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 09:37:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-29 09:37:58,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 09:37:58,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-29 09:37:58,024 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-29 09:37:58,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:58,025 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-29 09:37:58,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:37:58,025 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-29 09:37:58,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:37:58,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:58,026 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:58,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:37:58,026 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:58,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:58,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1589976073, now seen corresponding path program 14 times [2020-10-29 09:37:58,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:58,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449088414] [2020-10-29 09:37:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:58,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:58,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:58,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:37:58,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:58,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-29 09:37:58,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:58,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:58,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:37:58,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:58,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:37:58,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:58,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:58,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:58,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:58,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:58,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:58,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:37:58,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:58,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:58,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:58,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:58,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:58,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:58,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449088414] [2020-10-29 09:37:58,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:58,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:37:58,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864224497] [2020-10-29 09:37:58,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:37:58,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:58,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:37:58,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:37:58,914 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 18 states. [2020-10-29 09:37:59,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:59,947 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-29 09:37:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:37:59,948 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-29 09:37:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:59,949 INFO L225 Difference]: With dead ends: 34 [2020-10-29 09:37:59,949 INFO L226 Difference]: Without dead ends: 28 [2020-10-29 09:37:59,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:37:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-29 09:37:59,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-29 09:37:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:37:59,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-29 09:37:59,962 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-29 09:37:59,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:59,962 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-29 09:37:59,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:37:59,962 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-29 09:37:59,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:37:59,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:59,967 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:59,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:37:59,967 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:59,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:59,968 INFO L82 PathProgramCache]: Analyzing trace with hash -914329890, now seen corresponding path program 15 times [2020-10-29 09:37:59,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:59,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467425992] [2020-10-29 09:37:59,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:00,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:00,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:00,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:38:00,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:00,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 701 [2020-10-29 09:38:00,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:00,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:00,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:38:00,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:00,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:38:00,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:01,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:01,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:01,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:01,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:01,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:01,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:38:01,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:01,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:01,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:01,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:01,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:01,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:01,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467425992] [2020-10-29 09:38:01,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:01,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:38:01,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493063096] [2020-10-29 09:38:01,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:38:01,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:01,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:38:01,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:38:01,115 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 19 states. [2020-10-29 09:38:02,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:02,185 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-29 09:38:02,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:38:02,186 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-29 09:38:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:02,187 INFO L225 Difference]: With dead ends: 35 [2020-10-29 09:38:02,187 INFO L226 Difference]: Without dead ends: 29 [2020-10-29 09:38:02,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:38:02,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-29 09:38:02,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-29 09:38:02,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 09:38:02,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-29 09:38:02,195 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-29 09:38:02,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:02,195 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-29 09:38:02,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:38:02,196 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-29 09:38:02,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:38:02,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:02,196 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:02,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:38:02,197 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:02,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:02,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1444134697, now seen corresponding path program 16 times [2020-10-29 09:38:02,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:02,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335431897] [2020-10-29 09:38:02,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:02,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:02,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:02,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:38:02,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:02,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-29 09:38:02,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:02,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:02,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:38:02,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:02,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:38:02,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:38:03,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:03,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:03,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:03,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:03,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:03,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:38:03,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:03,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:03,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:03,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:03,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:03,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:03,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335431897] [2020-10-29 09:38:03,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:03,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:38:03,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867713816] [2020-10-29 09:38:03,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:38:03,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:03,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:38:03,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:38:03,217 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 20 states. [2020-10-29 09:38:04,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:04,469 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-29 09:38:04,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:38:04,469 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-29 09:38:04,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:04,470 INFO L225 Difference]: With dead ends: 36 [2020-10-29 09:38:04,470 INFO L226 Difference]: Without dead ends: 30 [2020-10-29 09:38:04,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:38:04,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-29 09:38:04,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-29 09:38:04,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-29 09:38:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-29 09:38:04,482 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-10-29 09:38:04,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:04,482 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-29 09:38:04,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:38:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-29 09:38:04,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:38:04,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:04,483 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:04,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:38:04,484 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:04,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:04,484 INFO L82 PathProgramCache]: Analyzing trace with hash -688214530, now seen corresponding path program 17 times [2020-10-29 09:38:04,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:04,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808893700] [2020-10-29 09:38:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:04,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:05,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:05,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:38:05,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:05,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 667 [2020-10-29 09:38:05,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:05,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:05,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:38:05,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:05,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:38:05,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:05,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:05,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:05,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:05,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:05,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:05,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:38:05,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:05,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:05,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:05,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:05,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:05,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:05,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808893700] [2020-10-29 09:38:05,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:05,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:38:05,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144091671] [2020-10-29 09:38:05,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:38:05,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:05,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:38:05,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:38:05,666 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 21 states. [2020-10-29 09:38:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:06,905 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-29 09:38:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:38:06,905 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-29 09:38:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:06,906 INFO L225 Difference]: With dead ends: 37 [2020-10-29 09:38:06,906 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 09:38:06,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:38:06,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 09:38:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-29 09:38:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 09:38:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-29 09:38:06,915 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-10-29 09:38:06,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:06,915 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-29 09:38:06,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:38:06,916 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-29 09:38:06,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:38:06,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:06,917 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:06,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:38:06,917 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:06,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:06,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1270474167, now seen corresponding path program 18 times [2020-10-29 09:38:06,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:06,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621541124] [2020-10-29 09:38:06,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:06,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:07,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:07,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:38:07,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:07,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 621 [2020-10-29 09:38:07,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:07,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:07,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:38:07,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:07,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:38:07,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:08,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:08,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:08,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:08,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:08,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:08,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:38:08,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:08,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:08,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:08,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:08,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:08,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:08,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621541124] [2020-10-29 09:38:08,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:08,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:38:08,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94882223] [2020-10-29 09:38:08,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:38:08,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:08,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:38:08,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:38:08,180 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 22 states. [2020-10-29 09:38:09,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:09,519 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-29 09:38:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:38:09,520 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-29 09:38:09,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:09,521 INFO L225 Difference]: With dead ends: 38 [2020-10-29 09:38:09,521 INFO L226 Difference]: Without dead ends: 32 [2020-10-29 09:38:09,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:38:09,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-29 09:38:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-29 09:38:09,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:38:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-29 09:38:09,534 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-10-29 09:38:09,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:09,534 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-29 09:38:09,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:38:09,534 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-29 09:38:09,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:38:09,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:09,536 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:09,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:38:09,536 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:09,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:09,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1860281630, now seen corresponding path program 19 times [2020-10-29 09:38:09,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:09,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577460623] [2020-10-29 09:38:09,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:09,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:10,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:10,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:38:10,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:10,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1111 [2020-10-29 09:38:10,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:10,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:10,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:38:10,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:10,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:38:10,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:38:11,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:11,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:11,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:11,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:11,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:11,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:38:11,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:11,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:11,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:11,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:11,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:11,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:11,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577460623] [2020-10-29 09:38:11,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:11,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:38:11,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667329146] [2020-10-29 09:38:11,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:38:11,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:11,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:38:11,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:38:11,209 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 23 states. [2020-10-29 09:38:12,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:12,611 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-29 09:38:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:38:12,611 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-29 09:38:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:12,612 INFO L225 Difference]: With dead ends: 39 [2020-10-29 09:38:12,612 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 09:38:12,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:38:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 09:38:12,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-29 09:38:12,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 09:38:12,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-29 09:38:12,620 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-10-29 09:38:12,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:12,620 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-29 09:38:12,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:38:12,620 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-29 09:38:12,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:38:12,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:12,621 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:12,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:38:12,621 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:12,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:12,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1330523497, now seen corresponding path program 20 times [2020-10-29 09:38:12,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:12,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850480382] [2020-10-29 09:38:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:12,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:13,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:13,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:38:13,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:13,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 983 [2020-10-29 09:38:13,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:13,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:13,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:38:13,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:13,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:38:13,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:14,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:14,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:14,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:14,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:14,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:14,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:38:14,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:14,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:14,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:14,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:14,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:14,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:38:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:14,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850480382] [2020-10-29 09:38:14,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:14,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:38:14,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530923452] [2020-10-29 09:38:14,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:38:14,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:14,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:38:14,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:38:14,169 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 24 states. [2020-10-29 09:38:15,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:15,675 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-29 09:38:15,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:38:15,678 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-29 09:38:15,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:15,679 INFO L225 Difference]: With dead ends: 40 [2020-10-29 09:38:15,679 INFO L226 Difference]: Without dead ends: 34 [2020-10-29 09:38:15,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:38:15,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-29 09:38:15,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-29 09:38:15,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 09:38:15,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-29 09:38:15,688 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-10-29 09:38:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:15,689 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-29 09:38:15,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:38:15,689 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-29 09:38:15,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:38:15,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:15,689 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:15,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:38:15,690 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:15,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:15,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1461234626, now seen corresponding path program 21 times [2020-10-29 09:38:15,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:15,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894810968] [2020-10-29 09:38:15,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:15,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:16,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:16,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:38:16,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:16,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1068 [2020-10-29 09:38:16,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:16,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:38:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:38:16,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:17,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:17,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:17,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:17,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:17,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:17,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:38:17,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:17,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:17,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:17,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:17,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:17,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:17,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894810968] [2020-10-29 09:38:17,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:17,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:38:17,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105640523] [2020-10-29 09:38:17,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:38:17,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:17,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:38:17,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:38:17,391 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 25 states. [2020-10-29 09:38:19,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:19,085 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-29 09:38:19,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:38:19,085 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-29 09:38:19,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:19,086 INFO L225 Difference]: With dead ends: 41 [2020-10-29 09:38:19,086 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 09:38:19,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:38:19,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 09:38:19,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-29 09:38:19,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 09:38:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-29 09:38:19,095 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-10-29 09:38:19,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:19,095 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-29 09:38:19,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:38:19,095 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-29 09:38:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:38:19,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:19,096 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:19,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:38:19,096 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:19,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:19,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1218312329, now seen corresponding path program 22 times [2020-10-29 09:38:19,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:19,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38177455] [2020-10-29 09:38:19,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:19,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:20,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:20,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:38:20,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:20,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1046 [2020-10-29 09:38:20,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:20,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:20,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:38:20,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:20,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:38:20,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:20,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:20,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:20,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:20,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:20,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:20,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:38:20,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:20,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:20,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:20,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:20,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:20,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:20,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38177455] [2020-10-29 09:38:20,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:20,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 09:38:20,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335015005] [2020-10-29 09:38:20,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 09:38:20,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:20,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 09:38:20,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:38:20,859 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 26 states. [2020-10-29 09:38:22,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:22,698 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-29 09:38:22,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:38:22,699 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-29 09:38:22,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:22,699 INFO L225 Difference]: With dead ends: 42 [2020-10-29 09:38:22,700 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 09:38:22,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:38:22,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 09:38:22,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-29 09:38:22,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:38:22,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-29 09:38:22,707 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-10-29 09:38:22,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:22,708 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-29 09:38:22,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 09:38:22,708 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-29 09:38:22,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:38:22,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:22,708 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:22,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:38:22,709 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:22,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:22,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2017311582, now seen corresponding path program 23 times [2020-10-29 09:38:22,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:22,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197551111] [2020-10-29 09:38:22,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:22,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:24,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:24,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:38:24,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:24,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1323 [2020-10-29 09:38:24,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:24,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:24,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:38:24,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:24,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:38:24,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:24,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:24,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:24,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:24,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:24,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:24,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:24,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:24,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:24,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:24,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:24,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:24,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:24,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197551111] [2020-10-29 09:38:24,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:24,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:38:24,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628254448] [2020-10-29 09:38:24,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:38:24,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:24,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:38:24,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:38:24,796 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 27 states. [2020-10-29 09:38:26,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:26,764 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-29 09:38:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:38:26,765 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2020-10-29 09:38:26,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:26,765 INFO L225 Difference]: With dead ends: 43 [2020-10-29 09:38:26,765 INFO L226 Difference]: Without dead ends: 37 [2020-10-29 09:38:26,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:38:26,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-29 09:38:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-29 09:38:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:38:26,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-29 09:38:26,773 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-10-29 09:38:26,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:26,773 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-29 09:38:26,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:38:26,773 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-29 09:38:26,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:38:26,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:26,774 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:26,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:38:26,774 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:26,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:26,775 INFO L82 PathProgramCache]: Analyzing trace with hash -757562281, now seen corresponding path program 24 times [2020-10-29 09:38:26,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:26,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70143980] [2020-10-29 09:38:26,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:26,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:28,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:28,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:38:28,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:28,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1429 [2020-10-29 09:38:28,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:28,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:28,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:38:28,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:28,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:38:28,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:29,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:29,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:29,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:29,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:29,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:29,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:38:29,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:29,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:29,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:29,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:29,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:29,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:29,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70143980] [2020-10-29 09:38:29,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:29,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 09:38:29,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229859229] [2020-10-29 09:38:29,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 09:38:29,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:29,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 09:38:29,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:38:29,029 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 28 states. [2020-10-29 09:38:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:31,172 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-29 09:38:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:38:31,172 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-10-29 09:38:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:31,173 INFO L225 Difference]: With dead ends: 44 [2020-10-29 09:38:31,173 INFO L226 Difference]: Without dead ends: 38 [2020-10-29 09:38:31,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:38:31,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-29 09:38:31,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-29 09:38:31,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 09:38:31,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-29 09:38:31,193 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-10-29 09:38:31,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:31,196 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-29 09:38:31,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 09:38:31,196 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-29 09:38:31,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:38:31,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:31,200 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:31,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:38:31,201 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:31,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:31,201 INFO L82 PathProgramCache]: Analyzing trace with hash -879306114, now seen corresponding path program 25 times [2020-10-29 09:38:31,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:31,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611571246] [2020-10-29 09:38:31,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:31,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:32,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:32,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:38:32,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:32,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1517 [2020-10-29 09:38:32,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:32,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:32,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 09:38:32,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:32,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:38:32,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:38:33,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:33,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:33,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:33,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:33,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:33,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:38:33,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:33,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:33,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:33,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:33,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:33,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:33,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611571246] [2020-10-29 09:38:33,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:33,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 09:38:33,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163911546] [2020-10-29 09:38:33,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 09:38:33,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:33,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 09:38:33,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:38:33,589 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 29 states. [2020-10-29 09:38:35,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:35,764 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-29 09:38:35,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:38:35,765 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2020-10-29 09:38:35,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:35,766 INFO L225 Difference]: With dead ends: 45 [2020-10-29 09:38:35,766 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:38:35,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 09:38:35,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:38:35,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-29 09:38:35,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 09:38:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-29 09:38:35,775 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-10-29 09:38:35,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:35,775 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-29 09:38:35,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 09:38:35,775 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-29 09:38:35,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:38:35,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:35,776 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:35,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:38:35,776 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:35,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:35,777 INFO L82 PathProgramCache]: Analyzing trace with hash -358397641, now seen corresponding path program 26 times [2020-10-29 09:38:35,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:35,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937679223] [2020-10-29 09:38:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:35,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:37,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:37,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:38:37,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:37,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1463 [2020-10-29 09:38:37,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:37,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:37,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 09:38:37,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:37,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:38:37,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:38,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:38,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:38,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:38,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:38,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:38,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:38:38,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:38,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:38,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:38,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:38,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:38,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:38,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937679223] [2020-10-29 09:38:38,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:38,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 09:38:38,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254956385] [2020-10-29 09:38:38,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 09:38:38,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:38,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 09:38:38,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:38:38,165 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 30 states. [2020-10-29 09:38:40,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:40,570 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-29 09:38:40,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:38:40,571 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2020-10-29 09:38:40,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:40,572 INFO L225 Difference]: With dead ends: 46 [2020-10-29 09:38:40,572 INFO L226 Difference]: Without dead ends: 40 [2020-10-29 09:38:40,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-29 09:38:40,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-29 09:38:40,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-29 09:38:40,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:38:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-29 09:38:40,582 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-10-29 09:38:40,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:40,583 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-29 09:38:40,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 09:38:40,583 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-29 09:38:40,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:38:40,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:40,584 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:40,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:38:40,584 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:40,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:40,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1390104162, now seen corresponding path program 27 times [2020-10-29 09:38:40,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:40,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440962677] [2020-10-29 09:38:40,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:40,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:42,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:42,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:38:42,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:42,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1562 [2020-10-29 09:38:42,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:42,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:42,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 09:38:42,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:42,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:38:42,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:43,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:43,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:43,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:43,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:43,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:43,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:43,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:43,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:43,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:43,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:43,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:43,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:43,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440962677] [2020-10-29 09:38:43,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:43,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 09:38:43,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328297558] [2020-10-29 09:38:43,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 09:38:43,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:43,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 09:38:43,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:38:43,124 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 31 states. [2020-10-29 09:38:45,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:45,682 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-29 09:38:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:38:45,683 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2020-10-29 09:38:45,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:45,684 INFO L225 Difference]: With dead ends: 47 [2020-10-29 09:38:45,684 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 09:38:45,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-29 09:38:45,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 09:38:45,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-29 09:38:45,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 09:38:45,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-29 09:38:45,691 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-10-29 09:38:45,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:45,692 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-29 09:38:45,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 09:38:45,692 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-29 09:38:45,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:38:45,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:45,692 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:45,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:38:45,693 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:45,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:45,693 INFO L82 PathProgramCache]: Analyzing trace with hash 986732055, now seen corresponding path program 28 times [2020-10-29 09:38:45,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:45,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539674589] [2020-10-29 09:38:45,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:45,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:47,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:47,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:38:47,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:47,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1783 [2020-10-29 09:38:47,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:47,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:47,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 09:38:47,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:47,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:38:47,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:48,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:48,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:48,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:48,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:48,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:48,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:38:48,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:48,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:48,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:48,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:48,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:48,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:48,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539674589] [2020-10-29 09:38:48,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:48,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 09:38:48,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927420320] [2020-10-29 09:38:48,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 09:38:48,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:48,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 09:38:48,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:38:48,472 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 32 states. [2020-10-29 09:38:51,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:51,205 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-29 09:38:51,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 09:38:51,206 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2020-10-29 09:38:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:51,206 INFO L225 Difference]: With dead ends: 48 [2020-10-29 09:38:51,207 INFO L226 Difference]: Without dead ends: 42 [2020-10-29 09:38:51,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-29 09:38:51,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-29 09:38:51,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-29 09:38:51,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 09:38:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-29 09:38:51,214 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-10-29 09:38:51,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:51,216 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-29 09:38:51,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 09:38:51,216 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-29 09:38:51,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:38:51,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:51,217 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:51,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:38:51,217 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:51,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:51,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1654210750, now seen corresponding path program 29 times [2020-10-29 09:38:51,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:51,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073284791] [2020-10-29 09:38:51,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:51,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:52,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:52,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:38:52,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:52,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1699 [2020-10-29 09:38:52,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:52,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:52,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 09:38:52,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:52,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:38:52,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:53,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:54,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:54,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:54,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:54,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:54,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:38:54,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:54,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:54,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:54,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:54,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:54,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:54,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073284791] [2020-10-29 09:38:54,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:54,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-29 09:38:54,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491051865] [2020-10-29 09:38:54,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-29 09:38:54,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:54,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-29 09:38:54,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:38:54,013 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 33 states. [2020-10-29 09:38:56,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:56,885 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-29 09:38:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 09:38:56,886 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 41 [2020-10-29 09:38:56,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:56,887 INFO L225 Difference]: With dead ends: 49 [2020-10-29 09:38:56,887 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 09:38:56,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-29 09:38:56,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 09:38:56,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-29 09:38:56,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 09:38:56,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-29 09:38:56,895 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-10-29 09:38:56,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:56,895 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-29 09:38:56,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-29 09:38:56,895 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-29 09:38:56,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:38:56,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:56,896 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:56,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:38:56,896 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:56,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:56,897 INFO L82 PathProgramCache]: Analyzing trace with hash 871213815, now seen corresponding path program 30 times [2020-10-29 09:38:56,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:56,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821656763] [2020-10-29 09:38:56,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:56,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:58,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:58,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:38:58,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:58,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1488 [2020-10-29 09:38:58,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:58,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:58,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-29 09:38:58,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:58,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:38:58,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:59,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:59,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:59,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:59,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:59,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:59,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:38:59,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:59,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:59,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:59,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:59,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:59,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:59,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821656763] [2020-10-29 09:38:59,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:59,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 09:38:59,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322780886] [2020-10-29 09:38:59,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 09:38:59,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:59,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 09:38:59,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:38:59,518 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 34 states. [2020-10-29 09:39:02,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:02,444 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-29 09:39:02,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 09:39:02,445 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2020-10-29 09:39:02,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:02,446 INFO L225 Difference]: With dead ends: 50 [2020-10-29 09:39:02,446 INFO L226 Difference]: Without dead ends: 44 [2020-10-29 09:39:02,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-29 09:39:02,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-29 09:39:02,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-29 09:39:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:39:02,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-29 09:39:02,456 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-10-29 09:39:02,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:02,456 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-29 09:39:02,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 09:39:02,456 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-29 09:39:02,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:39:02,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:02,456 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:02,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:39:02,457 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:02,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:02,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1926854690, now seen corresponding path program 31 times [2020-10-29 09:39:02,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:02,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399435647] [2020-10-29 09:39:02,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:02,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:04,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:04,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:39:04,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:04,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1645 [2020-10-29 09:39:04,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:04,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:04,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-29 09:39:04,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:04,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:39:04,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:05,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:05,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:05,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:05,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:05,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:05,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:05,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:05,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:05,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:05,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:05,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:05,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:39:05,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399435647] [2020-10-29 09:39:05,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:05,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-29 09:39:05,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676040075] [2020-10-29 09:39:05,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-29 09:39:05,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:05,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-29 09:39:05,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:39:05,280 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 35 states. [2020-10-29 09:39:08,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:08,470 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-29 09:39:08,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 09:39:08,471 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2020-10-29 09:39:08,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:08,472 INFO L225 Difference]: With dead ends: 51 [2020-10-29 09:39:08,472 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:39:08,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-29 09:39:08,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:39:08,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-29 09:39:08,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:39:08,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-29 09:39:08,479 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-10-29 09:39:08,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:08,479 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-29 09:39:08,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-29 09:39:08,479 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-29 09:39:08,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:39:08,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:08,480 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:08,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:39:08,480 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:08,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:08,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1527334871, now seen corresponding path program 32 times [2020-10-29 09:39:08,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:08,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048036753] [2020-10-29 09:39:08,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:08,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:10,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:10,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:39:10,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:10,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1780 [2020-10-29 09:39:10,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:10,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:10,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-29 09:39:10,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:10,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:39:10,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:11,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:11,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:11,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:11,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:11,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:11,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:11,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:11,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:11,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:11,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:11,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:11,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:39:11,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048036753] [2020-10-29 09:39:11,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:11,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-29 09:39:11,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746683027] [2020-10-29 09:39:11,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-29 09:39:11,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:11,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-29 09:39:11,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:39:11,538 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 36 states. [2020-10-29 09:39:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:14,918 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-29 09:39:14,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 09:39:14,920 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2020-10-29 09:39:14,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:14,920 INFO L225 Difference]: With dead ends: 52 [2020-10-29 09:39:14,921 INFO L226 Difference]: Without dead ends: 46 [2020-10-29 09:39:14,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-29 09:39:14,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-29 09:39:14,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-29 09:39:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 09:39:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-29 09:39:14,929 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-10-29 09:39:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:14,929 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-29 09:39:14,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-29 09:39:14,930 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-29 09:39:14,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:39:14,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:14,930 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:14,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:39:14,930 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:14,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:14,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1233028862, now seen corresponding path program 33 times [2020-10-29 09:39:14,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:14,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708370405] [2020-10-29 09:39:14,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:14,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:17,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:17,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:39:17,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:17,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2194 [2020-10-29 09:39:17,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:17,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:17,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 09:39:17,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:17,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:39:17,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:18,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:18,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:18,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:18,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:18,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:18,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:18,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:18,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:18,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:18,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:18,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:18,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:39:18,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708370405] [2020-10-29 09:39:18,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:18,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-29 09:39:18,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379517418] [2020-10-29 09:39:18,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-29 09:39:18,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:18,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-29 09:39:18,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:39:18,455 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 37 states. [2020-10-29 09:39:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:21,992 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-29 09:39:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 09:39:21,993 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 45 [2020-10-29 09:39:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:21,994 INFO L225 Difference]: With dead ends: 53 [2020-10-29 09:39:21,994 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 09:39:21,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-29 09:39:21,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 09:39:22,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-29 09:39:22,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:39:22,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-29 09:39:22,004 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-10-29 09:39:22,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:22,004 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-29 09:39:22,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-29 09:39:22,004 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-29 09:39:22,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:39:22,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:22,005 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:22,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:39:22,005 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:22,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:22,006 INFO L82 PathProgramCache]: Analyzing trace with hash 699477175, now seen corresponding path program 34 times [2020-10-29 09:39:22,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:22,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995974367] [2020-10-29 09:39:22,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:22,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:24,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:24,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:39:24,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:24,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2294 [2020-10-29 09:39:24,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:24,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:24,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-29 09:39:24,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:24,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:39:24,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:25,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:25,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:25,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:25,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:25,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:25,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:25,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:25,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:25,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:25,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:25,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:25,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:39:25,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995974367] [2020-10-29 09:39:25,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:25,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-29 09:39:25,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980001836] [2020-10-29 09:39:25,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-29 09:39:25,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:25,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-29 09:39:25,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:39:25,689 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 38 states. [2020-10-29 09:39:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:29,344 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-29 09:39:29,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-29 09:39:29,344 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 46 [2020-10-29 09:39:29,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:29,345 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:39:29,345 INFO L226 Difference]: Without dead ends: 48 [2020-10-29 09:39:29,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2020-10-29 09:39:29,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-29 09:39:29,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-29 09:39:29,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:39:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-29 09:39:29,354 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-10-29 09:39:29,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:29,354 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-29 09:39:29,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-29 09:39:29,355 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-29 09:39:29,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:39:29,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:29,355 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:29,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:39:29,356 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:29,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:29,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1339244062, now seen corresponding path program 35 times [2020-10-29 09:39:29,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:29,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601841996] [2020-10-29 09:39:29,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:29,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:32,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:32,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:39:32,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:32,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2896 [2020-10-29 09:39:32,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:32,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:32,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-29 09:39:32,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:32,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:39:32,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:33,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:33,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:33,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:33,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:33,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:33,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:33,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:33,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:33,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:33,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:33,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:33,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:39:33,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601841996] [2020-10-29 09:39:33,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:33,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-29 09:39:33,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732837252] [2020-10-29 09:39:33,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-29 09:39:33,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:33,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-29 09:39:33,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:39:33,641 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 39 states. [2020-10-29 09:39:37,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:37,549 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-29 09:39:37,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-29 09:39:37,550 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 47 [2020-10-29 09:39:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:37,551 INFO L225 Difference]: With dead ends: 55 [2020-10-29 09:39:37,551 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:39:37,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-29 09:39:37,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:39:37,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-29 09:39:37,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:39:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-29 09:39:37,560 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-10-29 09:39:37,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:37,560 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-29 09:39:37,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-29 09:39:37,560 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-29 09:39:37,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:39:37,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:37,561 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:37,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:39:37,561 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:37,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:37,562 INFO L82 PathProgramCache]: Analyzing trace with hash -302818921, now seen corresponding path program 36 times [2020-10-29 09:39:37,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:37,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049660180] [2020-10-29 09:39:37,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:37,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:40,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:40,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:39:40,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:40,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3116 [2020-10-29 09:39:40,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:40,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:40,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-29 09:39:40,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:40,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:39:40,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:42,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:42,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:42,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:42,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:42,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:42,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:42,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:42,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:42,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:42,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:42,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:42,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:39:42,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049660180] [2020-10-29 09:39:42,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:42,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-29 09:39:42,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683993964] [2020-10-29 09:39:42,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-29 09:39:42,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:42,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-29 09:39:42,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:39:42,190 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 40 states. [2020-10-29 09:39:46,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:46,259 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-29 09:39:46,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-29 09:39:46,260 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2020-10-29 09:39:46,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:46,261 INFO L225 Difference]: With dead ends: 56 [2020-10-29 09:39:46,261 INFO L226 Difference]: Without dead ends: 50 [2020-10-29 09:39:46,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2020-10-29 09:39:46,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-29 09:39:46,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-29 09:39:46,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-29 09:39:46,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-29 09:39:46,268 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-10-29 09:39:46,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:46,268 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-29 09:39:46,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-29 09:39:46,268 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-29 09:39:46,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:39:46,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:46,269 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:46,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:39:46,269 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:46,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:46,270 INFO L82 PathProgramCache]: Analyzing trace with hash 332836158, now seen corresponding path program 37 times [2020-10-29 09:39:46,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:46,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692883772] [2020-10-29 09:39:46,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:46,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:48,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:48,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:39:48,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:48,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2414 [2020-10-29 09:39:48,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:48,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:48,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-29 09:39:48,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:48,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:39:48,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:50,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:50,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:50,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:50,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:50,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:50,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:39:50,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:50,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:50,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:50,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:50,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:50,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:39:50,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692883772] [2020-10-29 09:39:50,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:50,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-29 09:39:50,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662205847] [2020-10-29 09:39:50,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-29 09:39:50,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:50,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-29 09:39:50,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:39:50,296 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 41 states. [2020-10-29 09:39:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:54,581 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-29 09:39:54,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-29 09:39:54,582 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 49 [2020-10-29 09:39:54,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:54,583 INFO L225 Difference]: With dead ends: 57 [2020-10-29 09:39:54,583 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 09:39:54,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2020-10-29 09:39:54,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 09:39:54,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-29 09:39:54,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-29 09:39:54,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-29 09:39:54,591 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-10-29 09:39:54,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:54,591 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-29 09:39:54,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-29 09:39:54,591 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-29 09:39:54,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:39:54,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:54,592 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:54,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:39:54,592 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:54,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:54,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1436692873, now seen corresponding path program 38 times [2020-10-29 09:39:54,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:54,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209472734] [2020-10-29 09:39:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:54,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:57,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:57,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:39:57,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:57,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2526 [2020-10-29 09:39:57,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:57,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:57,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-29 09:39:57,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:57,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:39:57,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:58,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:58,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:58,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:58,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:58,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:58,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:39:58,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:58,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:58,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:58,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:58,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:58,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:39:58,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209472734] [2020-10-29 09:39:58,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:58,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-29 09:39:58,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372356098] [2020-10-29 09:39:58,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-29 09:39:58,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:58,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-29 09:39:58,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 09:39:58,835 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 42 states. [2020-10-29 09:40:03,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:40:03,299 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-29 09:40:03,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-29 09:40:03,300 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 50 [2020-10-29 09:40:03,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:40:03,301 INFO L225 Difference]: With dead ends: 58 [2020-10-29 09:40:03,301 INFO L226 Difference]: Without dead ends: 52 [2020-10-29 09:40:03,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2020-10-29 09:40:03,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-29 09:40:03,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-29 09:40:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 09:40:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-29 09:40:03,310 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-10-29 09:40:03,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:40:03,310 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-29 09:40:03,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-29 09:40:03,310 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-29 09:40:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:40:03,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:40:03,311 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:40:03,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:40:03,311 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:40:03,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:40:03,312 INFO L82 PathProgramCache]: Analyzing trace with hash -457517986, now seen corresponding path program 39 times [2020-10-29 09:40:03,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:40:03,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510104302] [2020-10-29 09:40:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:40:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:03,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:05,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:05,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:40:05,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:05,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2630 [2020-10-29 09:40:05,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:05,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:05,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-29 09:40:05,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:40:05,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:40:05,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:07,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:40:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:07,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:07,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:07,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:40:07,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:07,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:40:07,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:07,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:07,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:40:07,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:40:07,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:40:07,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:40:07,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510104302] [2020-10-29 09:40:07,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:40:07,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-29 09:40:07,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10440725] [2020-10-29 09:40:07,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-29 09:40:07,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:40:07,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-29 09:40:07,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:40:07,743 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 43 states. [2020-10-29 09:40:12,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:40:12,333 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-29 09:40:12,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-29 09:40:12,334 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 51 [2020-10-29 09:40:12,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:40:12,335 INFO L225 Difference]: With dead ends: 59 [2020-10-29 09:40:12,335 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 09:40:12,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-29 09:40:12,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 09:40:12,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-29 09:40:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 09:40:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-29 09:40:12,344 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-10-29 09:40:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:40:12,344 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-29 09:40:12,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-29 09:40:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-29 09:40:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:40:12,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:40:12,345 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:40:12,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:40:12,345 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:40:12,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:40:12,346 INFO L82 PathProgramCache]: Analyzing trace with hash -167867561, now seen corresponding path program 40 times [2020-10-29 09:40:12,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:40:12,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939663966] [2020-10-29 09:40:12,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:40:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:12,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:16,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:16,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:40:16,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:16,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3925 [2020-10-29 09:40:16,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:16,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:16,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-29 09:40:16,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:40:16,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:40:16,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:18,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:40:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:18,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:18,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:18,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:40:18,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:18,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:40:18,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:18,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:18,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:40:18,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:40:18,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:40:18,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:40:18,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939663966] [2020-10-29 09:40:18,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:40:18,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-29 09:40:18,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100446372] [2020-10-29 09:40:18,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-29 09:40:18,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:40:18,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-29 09:40:18,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:40:18,143 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 44 states. [2020-10-29 09:40:22,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:40:22,987 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-29 09:40:22,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-29 09:40:22,988 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 52 [2020-10-29 09:40:22,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:40:22,989 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:40:22,989 INFO L226 Difference]: Without dead ends: 54 [2020-10-29 09:40:22,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2020-10-29 09:40:22,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-29 09:40:22,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-29 09:40:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 09:40:22,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-29 09:40:22,995 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-10-29 09:40:22,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:40:22,995 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-29 09:40:22,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-29 09:40:22,995 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-29 09:40:22,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 09:40:22,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:40:22,996 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:40:22,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:40:22,996 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:40:22,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:40:22,996 INFO L82 PathProgramCache]: Analyzing trace with hash 221361022, now seen corresponding path program 41 times [2020-10-29 09:40:22,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:40:22,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704069637] [2020-10-29 09:40:22,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:40:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:23,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:26,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:26,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 09:40:26,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:26,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3881 [2020-10-29 09:40:26,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:26,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:26,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-29 09:40:26,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:40:26,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:40:26,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:28,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:40:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:28,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:28,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:28,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:40:28,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:28,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:40:28,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:28,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:28,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:40:28,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:40:28,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:40:28,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:40:28,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704069637] [2020-10-29 09:40:28,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:40:28,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-29 09:40:28,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598237293] [2020-10-29 09:40:28,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-29 09:40:28,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:40:28,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-29 09:40:28,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:40:28,821 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 45 states. [2020-10-29 09:40:33,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:40:33,956 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-29 09:40:33,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-29 09:40:33,957 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 53 [2020-10-29 09:40:33,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:40:33,958 INFO L225 Difference]: With dead ends: 61 [2020-10-29 09:40:33,958 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:40:33,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=378, Invalid=7104, Unknown=0, NotChecked=0, Total=7482 [2020-10-29 09:40:33,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:40:33,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-29 09:40:33,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 09:40:33,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-29 09:40:33,967 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-10-29 09:40:33,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:40:33,967 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-29 09:40:33,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-29 09:40:33,967 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-29 09:40:33,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:40:33,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:40:33,968 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:40:33,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:40:33,968 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:40:33,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:40:33,968 INFO L82 PathProgramCache]: Analyzing trace with hash -597454793, now seen corresponding path program 42 times [2020-10-29 09:40:33,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:40:33,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122420215] [2020-10-29 09:40:33,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:40:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:34,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:37,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:37,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:40:37,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:37,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3984 [2020-10-29 09:40:37,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:37,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:37,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-29 09:40:37,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:40:37,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:40:37,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:40,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:40:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:40,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:40,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:40,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:40:40,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:40,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:40:40,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:40,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:40,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:40:40,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:40:40,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:40:40,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:40:40,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122420215] [2020-10-29 09:40:40,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:40:40,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-29 09:40:40,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137415621] [2020-10-29 09:40:40,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-29 09:40:40,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:40:40,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-29 09:40:40,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 09:40:40,019 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 46 states. [2020-10-29 09:40:45,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:40:45,312 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-29 09:40:45,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-29 09:40:45,312 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 54 [2020-10-29 09:40:45,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:40:45,313 INFO L225 Difference]: With dead ends: 62 [2020-10-29 09:40:45,313 INFO L226 Difference]: Without dead ends: 56 [2020-10-29 09:40:45,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2020-10-29 09:40:45,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-29 09:40:45,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-29 09:40:45,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 09:40:45,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-29 09:40:45,323 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-10-29 09:40:45,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:40:45,323 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-29 09:40:45,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-29 09:40:45,323 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-29 09:40:45,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 09:40:45,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:40:45,323 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:40:45,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-29 09:40:45,324 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:40:45,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:40:45,324 INFO L82 PathProgramCache]: Analyzing trace with hash -210941282, now seen corresponding path program 43 times [2020-10-29 09:40:45,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:40:45,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666656663] [2020-10-29 09:40:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:40:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:45,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:49,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:49,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 09:40:49,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:49,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4077 [2020-10-29 09:40:49,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:49,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:49,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-29 09:40:49,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:40:49,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 09:40:49,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:51,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:40:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:51,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:51,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:51,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:40:51,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:51,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:40:51,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:51,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:51,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:40:51,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:40:51,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:40:51,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:40:51,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666656663] [2020-10-29 09:40:51,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:40:51,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-29 09:40:51,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113834674] [2020-10-29 09:40:51,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-29 09:40:51,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:40:51,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-29 09:40:51,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:40:51,525 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 47 states. [2020-10-29 09:40:56,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:40:56,944 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-29 09:40:56,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-29 09:40:56,945 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 55 [2020-10-29 09:40:56,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:40:56,946 INFO L225 Difference]: With dead ends: 63 [2020-10-29 09:40:56,946 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 09:40:56,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=396, Invalid=7794, Unknown=0, NotChecked=0, Total=8190 [2020-10-29 09:40:56,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 09:40:56,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-29 09:40:56,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 09:40:56,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-29 09:40:56,953 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-10-29 09:40:56,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:40:56,953 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-29 09:40:56,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-29 09:40:56,953 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-29 09:40:56,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:40:56,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:40:56,953 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:40:56,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-29 09:40:56,954 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:40:56,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:40:56,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1113924329, now seen corresponding path program 44 times [2020-10-29 09:40:56,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:40:56,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222957430] [2020-10-29 09:40:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:40:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:57,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:01,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:01,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 09:41:01,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:41:01,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4216 [2020-10-29 09:41:01,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:01,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:01,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-29 09:41:01,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:41:01,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:41:01,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:03,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:41:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:03,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:03,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:03,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:41:03,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:41:03,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:41:03,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:03,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:03,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:41:03,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:41:03,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:41:03,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:41:03,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222957430] [2020-10-29 09:41:03,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:41:03,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-29 09:41:03,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048256436] [2020-10-29 09:41:03,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-29 09:41:03,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:41:03,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-29 09:41:03,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2020-10-29 09:41:03,393 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 48 states. [2020-10-29 09:41:09,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:41:09,224 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-29 09:41:09,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-29 09:41:09,225 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 56 [2020-10-29 09:41:09,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:41:09,226 INFO L225 Difference]: With dead ends: 64 [2020-10-29 09:41:09,226 INFO L226 Difference]: Without dead ends: 58 [2020-10-29 09:41:09,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2020-10-29 09:41:09,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-29 09:41:09,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-29 09:41:09,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-29 09:41:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-29 09:41:09,233 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-10-29 09:41:09,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:41:09,233 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-29 09:41:09,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-29 09:41:09,233 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-29 09:41:09,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 09:41:09,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:41:09,234 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:41:09,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-29 09:41:09,234 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:41:09,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:41:09,235 INFO L82 PathProgramCache]: Analyzing trace with hash 958372286, now seen corresponding path program 45 times [2020-10-29 09:41:09,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:41:09,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405869972] [2020-10-29 09:41:09,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:41:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:09,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:14,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:14,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:41:14,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:41:14,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 09:41:14,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:14,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:14,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-29 09:41:14,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:41:14,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 09:41:14,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:16,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:41:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:16,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:16,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:16,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:41:16,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:41:16,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:41:16,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:16,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:16,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:41:16,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:41:16,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:41:16,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:41:16,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405869972] [2020-10-29 09:41:16,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:41:16,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-29 09:41:16,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804455213] [2020-10-29 09:41:16,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-29 09:41:16,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:41:16,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-29 09:41:16,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:41:16,565 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 49 states. [2020-10-29 09:41:22,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:41:22,748 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-29 09:41:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-29 09:41:22,749 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 57 [2020-10-29 09:41:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:41:22,750 INFO L225 Difference]: With dead ends: 65 [2020-10-29 09:41:22,750 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 09:41:22,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=414, Invalid=8516, Unknown=0, NotChecked=0, Total=8930 [2020-10-29 09:41:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 09:41:22,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-29 09:41:22,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 09:41:22,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-29 09:41:22,759 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-10-29 09:41:22,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:41:22,759 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-29 09:41:22,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-29 09:41:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-29 09:41:22,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 09:41:22,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:41:22,760 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:41:22,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-29 09:41:22,760 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:41:22,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:41:22,761 INFO L82 PathProgramCache]: Analyzing trace with hash 775057911, now seen corresponding path program 46 times [2020-10-29 09:41:22,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:41:22,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098587540] [2020-10-29 09:41:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:41:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:22,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:27,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:27,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 09:41:27,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:41:27,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 09:41:27,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:27,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:27,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-29 09:41:27,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:41:27,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 09:41:27,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:30,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:41:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:30,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:30,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:30,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:41:30,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:41:30,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:41:30,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:30,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:30,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:41:30,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:41:30,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:41:30,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:41:30,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098587540] [2020-10-29 09:41:30,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:41:30,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-29 09:41:30,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566566133] [2020-10-29 09:41:30,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-29 09:41:30,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:41:30,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-29 09:41:30,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2020-10-29 09:41:30,163 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 50 states.