/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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 -i ../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 04:59:57,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 04:59:57,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 04:59:57,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 04:59:57,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 04:59:57,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 04:59:57,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 04:59:57,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 04:59:57,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 04:59:57,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 04:59:57,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 04:59:57,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 04:59:57,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 04:59:57,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 04:59:57,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 04:59:57,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 04:59:57,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 04:59:57,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 04:59:57,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 04:59:57,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 04:59:57,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 04:59:57,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 04:59:57,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 04:59:57,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 04:59:57,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 04:59:57,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 04:59:57,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 04:59:57,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 04:59:57,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 04:59:57,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 04:59:57,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 04:59:57,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 04:59:57,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 04:59:57,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 04:59:57,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 04:59:57,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 04:59:57,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 04:59:57,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 04:59:57,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 04:59:57,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 04:59:57,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 04:59:57,066 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 [2020-10-14 04:59:57,115 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 04:59:57,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 04:59:57,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 04:59:57,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 04:59:57,119 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 04:59:57,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 04:59:57,119 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 04:59:57,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 04:59:57,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 04:59:57,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 04:59:57,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 04:59:57,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 04:59:57,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 04:59:57,124 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 04:59:57,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 04:59:57,124 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 04:59:57,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 04:59:57,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 04:59:57,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 04:59:57,125 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 04:59:57,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 04:59:57,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 04:59:57,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 04:59:57,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 04:59:57,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 04:59:57,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 04:59:57,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 04:59:57,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 04:59:57,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 04:59:57,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 04:59:57,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 04:59:57,476 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 04:59:57,480 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 04:59:57,482 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 04:59:57,482 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 04:59:57,483 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2020-10-14 04:59:57,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6b98d135/e1532e1ac48e49dab524169cfdcb777d/FLAGc3f617ac4 [2020-10-14 04:59:58,084 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 04:59:58,084 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-2.i [2020-10-14 04:59:58,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6b98d135/e1532e1ac48e49dab524169cfdcb777d/FLAGc3f617ac4 [2020-10-14 04:59:58,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6b98d135/e1532e1ac48e49dab524169cfdcb777d [2020-10-14 04:59:58,410 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 04:59:58,411 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 04:59:58,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 04:59:58,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 04:59:58,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 04:59:58,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 04:59:58" (1/1) ... [2020-10-14 04:59:58,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35272ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:58, skipping insertion in model container [2020-10-14 04:59:58,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 04:59:58" (1/1) ... [2020-10-14 04:59:58,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 04:59:58,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 04:59:58,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 04:59:58,948 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 04:59:58,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 04:59:59,057 INFO L208 MainTranslator]: Completed translation [2020-10-14 04:59:59,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:59 WrapperNode [2020-10-14 04:59:59,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 04:59:59,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 04:59:59,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 04:59:59,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 04:59:59,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:59" (1/1) ... [2020-10-14 04:59:59,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:59" (1/1) ... [2020-10-14 04:59:59,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:59" (1/1) ... [2020-10-14 04:59:59,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:59" (1/1) ... [2020-10-14 04:59:59,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:59" (1/1) ... [2020-10-14 04:59:59,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:59" (1/1) ... [2020-10-14 04:59:59,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:59" (1/1) ... [2020-10-14 04:59:59,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 04:59:59,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 04:59:59,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 04:59:59,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 04:59:59,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:59" (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 [2020-10-14 04:59:59,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 04:59:59,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 04:59:59,205 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 04:59:59,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 04:59:59,206 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-14 04:59:59,206 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2020-10-14 04:59:59,207 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2020-10-14 04:59:59,208 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2020-10-14 04:59:59,208 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2020-10-14 04:59:59,208 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 04:59:59,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 04:59:59,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 04:59:59,209 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 04:59:59,209 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 04:59:59,209 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 04:59:59,210 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 04:59:59,210 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 04:59:59,211 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 04:59:59,211 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 04:59:59,211 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 04:59:59,212 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 04:59:59,212 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 04:59:59,214 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 04:59:59,214 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 04:59:59,214 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 04:59:59,216 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 04:59:59,216 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 04:59:59,216 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 04:59:59,217 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 04:59:59,217 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 04:59:59,217 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 04:59:59,217 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 04:59:59,218 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 04:59:59,218 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 04:59:59,219 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 04:59:59,219 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 04:59:59,219 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 04:59:59,221 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 04:59:59,222 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 04:59:59,222 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 04:59:59,222 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 04:59:59,222 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 04:59:59,222 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 04:59:59,223 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 04:59:59,224 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 04:59:59,224 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 04:59:59,224 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 04:59:59,225 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 04:59:59,225 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 04:59:59,225 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 04:59:59,225 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 04:59:59,225 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 04:59:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 04:59:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 04:59:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 04:59:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 04:59:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 04:59:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 04:59:59,227 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 04:59:59,227 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 04:59:59,227 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 04:59:59,227 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 04:59:59,227 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 04:59:59,228 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 04:59:59,228 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 04:59:59,228 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 04:59:59,228 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 04:59:59,229 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 04:59:59,230 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-14 04:59:59,230 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 04:59:59,230 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 04:59:59,231 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 04:59:59,231 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 04:59:59,231 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 04:59:59,231 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 04:59:59,232 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 04:59:59,232 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 04:59:59,232 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 04:59:59,232 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 04:59:59,232 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 04:59:59,232 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 04:59:59,232 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 04:59:59,232 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 04:59:59,232 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 04:59:59,232 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 04:59:59,232 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 04:59:59,233 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 04:59:59,233 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 04:59:59,233 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 04:59:59,233 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 04:59:59,233 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 04:59:59,233 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 04:59:59,233 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 04:59:59,233 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 04:59:59,233 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 04:59:59,233 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 04:59:59,234 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 04:59:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 04:59:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 04:59:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 04:59:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 04:59:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 04:59:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 04:59:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 04:59:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 04:59:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 04:59:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 04:59:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 04:59:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 04:59:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 04:59:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 04:59:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 04:59:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 04:59:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 04:59:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 04:59:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 04:59:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 04:59:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-14 04:59:59,239 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2020-10-14 04:59:59,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 04:59:59,239 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2020-10-14 04:59:59,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 04:59:59,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 04:59:59,240 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2020-10-14 04:59:59,240 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2020-10-14 04:59:59,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 04:59:59,244 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 04:59:59,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 04:59:59,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 04:59:59,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 04:59:59,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 04:59:59,607 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-14 04:59:59,955 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 04:59:59,955 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-14 04:59:59,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:59:59 BoogieIcfgContainer [2020-10-14 04:59:59,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 04:59:59,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 04:59:59,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 04:59:59,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 04:59:59,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 04:59:58" (1/3) ... [2020-10-14 04:59:59,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed4060b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:59:59, skipping insertion in model container [2020-10-14 04:59:59,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:59" (2/3) ... [2020-10-14 04:59:59,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed4060b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:59:59, skipping insertion in model container [2020-10-14 04:59:59,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:59:59" (3/3) ... [2020-10-14 04:59:59,968 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-2.i [2020-10-14 04:59:59,979 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 04:59:59,986 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:00:00,002 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:00:00,028 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:00:00,028 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:00:00,028 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:00:00,029 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:00:00,029 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:00:00,029 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:00:00,029 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:00:00,029 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:00:00,050 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-14 05:00:00,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 05:00:00,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:00,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:00,059 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:00,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:00,065 INFO L82 PathProgramCache]: Analyzing trace with hash 407034730, now seen corresponding path program 1 times [2020-10-14 05:00:00,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:00,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164152541] [2020-10-14 05:00:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:00,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:00,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:00,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:00,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:00:00,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:00:00,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-14 05:00:00,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:00,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:00,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:00,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:00:00,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:00,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 05:00:00,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:00,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:00,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:00,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:00,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:00,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 05:00:00,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:00,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:00,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:00,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:00,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:00,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:00:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:00,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164152541] [2020-10-14 05:00:00,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:00:00,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:00:00,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654371848] [2020-10-14 05:00:00,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:00:00,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:00,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:00:00,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:00:00,675 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 3 states. [2020-10-14 05:00:00,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:00,881 INFO L93 Difference]: Finished difference Result 95 states and 129 transitions. [2020-10-14 05:00:00,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:00:00,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-14 05:00:00,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:00,892 INFO L225 Difference]: With dead ends: 95 [2020-10-14 05:00:00,892 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 05:00:00,896 INFO L675 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 [2020-10-14 05:00:00,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 05:00:00,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-14 05:00:00,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-14 05:00:00,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-14 05:00:00,928 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-10-14 05:00:00,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:00,929 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-14 05:00:00,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:00:00,929 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-14 05:00:00,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:00:00,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:00,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:00,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:00:00,931 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:00,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:00,931 INFO L82 PathProgramCache]: Analyzing trace with hash -709462780, now seen corresponding path program 1 times [2020-10-14 05:00:00,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:00,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535593578] [2020-10-14 05:00:00,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:00,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:01,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:01,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:00:01,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:01,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-14 05:00:01,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:01,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:01,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:00:01,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:00:01,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:00:01,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:00:01,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:01,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:01,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:01,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:01,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:01,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 05:00:01,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:01,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:01,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:01,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:01,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:01,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:00:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:01,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535593578] [2020-10-14 05:00:01,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:00:01,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 05:00:01,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887120041] [2020-10-14 05:00:01,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:00:01,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:01,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:00:01,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:00:01,114 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-10-14 05:00:01,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:01,256 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-14 05:00:01,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:00:01,258 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-14 05:00:01,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:01,259 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:00:01,259 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 05:00:01,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:00:01,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 05:00:01,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-10-14 05:00:01,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 05:00:01,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-14 05:00:01,278 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2020-10-14 05:00:01,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:01,278 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-14 05:00:01,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:00:01,279 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-14 05:00:01,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 05:00:01,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:01,280 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:01,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:00:01,280 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:01,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:01,281 INFO L82 PathProgramCache]: Analyzing trace with hash -66753378, now seen corresponding path program 1 times [2020-10-14 05:00:01,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:01,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785160111] [2020-10-14 05:00:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:01,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:01,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:01,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 05:00:01,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:01,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-14 05:00:01,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:01,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:01,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:00:01,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:00:01,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:00:01,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:00:01,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:01,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:01,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:01,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:01,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:01,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:00:01,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:01,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:01,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:01,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:01,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:01,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:00:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:01,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785160111] [2020-10-14 05:00:01,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:01,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:00:01,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420577471] [2020-10-14 05:00:01,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:00:01,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:01,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:00:01,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:00:01,429 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-14 05:00:01,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:01,510 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-14 05:00:01,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:00:01,511 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-14 05:00:01,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:01,512 INFO L225 Difference]: With dead ends: 37 [2020-10-14 05:00:01,513 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 05:00:01,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:00:01,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 05:00:01,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2020-10-14 05:00:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 05:00:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-14 05:00:01,519 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-14 05:00:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:01,519 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-14 05:00:01,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:00:01,519 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-14 05:00:01,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:00:01,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:01,521 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:01,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:00:01,521 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:01,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:01,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1381959275, now seen corresponding path program 1 times [2020-10-14 05:00:01,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:01,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282331498] [2020-10-14 05:00:01,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:01,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:01,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:01,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:00:01,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:01,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-14 05:00:01,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:01,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:01,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:00:01,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:01,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:00:01,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:00:01,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:01,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:01,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:01,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:01,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:01,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 05:00:01,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:01,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:01,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:01,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:01,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:01,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:00:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:01,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282331498] [2020-10-14 05:00:01,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:01,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:00:01,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703268459] [2020-10-14 05:00:01,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:00:01,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:01,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:00:01,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:00:01,893 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-10-14 05:00:02,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:02,083 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-14 05:00:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:00:02,083 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-14 05:00:02,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:02,084 INFO L225 Difference]: With dead ends: 37 [2020-10-14 05:00:02,084 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 05:00:02,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:00:02,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 05:00:02,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-10-14 05:00:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 05:00:02,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-14 05:00:02,091 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2020-10-14 05:00:02,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:02,091 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-14 05:00:02,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:00:02,092 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-14 05:00:02,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:00:02,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:02,093 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:02,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:00:02,093 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:02,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:02,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1602875945, now seen corresponding path program 1 times [2020-10-14 05:00:02,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:02,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881502633] [2020-10-14 05:00:02,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:02,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:02,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:02,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:00:02,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:02,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-14 05:00:02,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:02,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:02,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:00:02,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:02,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:00:02,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:02,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:02,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:02,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:02,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:02,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:02,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:00:02,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:02,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:02,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:02,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:02,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:02,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:02,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881502633] [2020-10-14 05:00:02,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:02,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:00:02,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142059120] [2020-10-14 05:00:02,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:00:02,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:02,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:00:02,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:00:02,474 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 10 states. [2020-10-14 05:00:02,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:02,702 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-14 05:00:02,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:00:02,703 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-14 05:00:02,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:02,704 INFO L225 Difference]: With dead ends: 40 [2020-10-14 05:00:02,704 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 05:00:02,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:00:02,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 05:00:02,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2020-10-14 05:00:02,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 05:00:02,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-14 05:00:02,710 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2020-10-14 05:00:02,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:02,711 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-14 05:00:02,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:00:02,711 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-14 05:00:02,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:00:02,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:02,712 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:02,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:00:02,712 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:02,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:02,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1006799954, now seen corresponding path program 2 times [2020-10-14 05:00:02,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:02,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727165411] [2020-10-14 05:00:02,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:02,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:02,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:02,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:00:02,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:02,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-14 05:00:02,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:02,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:02,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:00:02,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:02,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:00:02,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:03,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:03,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:03,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:03,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:03,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:03,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:00:03,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:03,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:03,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:03,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:03,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:03,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:00:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:03,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727165411] [2020-10-14 05:00:03,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:03,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:00:03,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593787017] [2020-10-14 05:00:03,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:00:03,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:03,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:00:03,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:00:03,140 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 11 states. [2020-10-14 05:00:03,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:03,555 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-10-14 05:00:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:00:03,556 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-14 05:00:03,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:03,557 INFO L225 Difference]: With dead ends: 47 [2020-10-14 05:00:03,557 INFO L226 Difference]: Without dead ends: 45 [2020-10-14 05:00:03,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:00:03,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-14 05:00:03,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2020-10-14 05:00:03,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 05:00:03,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-14 05:00:03,570 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 22 [2020-10-14 05:00:03,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:03,570 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-14 05:00:03,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:00:03,573 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-14 05:00:03,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:00:03,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:03,575 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:03,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:00:03,575 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:03,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:03,576 INFO L82 PathProgramCache]: Analyzing trace with hash 173981419, now seen corresponding path program 2 times [2020-10-14 05:00:03,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:03,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478767252] [2020-10-14 05:00:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:03,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:03,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:03,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:00:03,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:03,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-14 05:00:03,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:03,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:03,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:00:03,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:03,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:00:03,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:04,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:04,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:04,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:04,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:04,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:04,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:00:04,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:04,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:04,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:04,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:04,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:04,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:04,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478767252] [2020-10-14 05:00:04,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:04,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:00:04,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502082617] [2020-10-14 05:00:04,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:00:04,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:04,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:00:04,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:00:04,109 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 10 states. [2020-10-14 05:00:04,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:04,380 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-10-14 05:00:04,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:00:04,381 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-14 05:00:04,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:04,382 INFO L225 Difference]: With dead ends: 49 [2020-10-14 05:00:04,382 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 05:00:04,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:00:04,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 05:00:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-10-14 05:00:04,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 05:00:04,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-14 05:00:04,387 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2020-10-14 05:00:04,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:04,388 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-14 05:00:04,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:00:04,388 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-14 05:00:04,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:00:04,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:04,389 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:04,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:00:04,389 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:04,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:04,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1825663632, now seen corresponding path program 3 times [2020-10-14 05:00:04,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:04,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962677423] [2020-10-14 05:00:04,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:04,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:04,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:04,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:00:04,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:04,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-14 05:00:04,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:04,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:04,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:00:04,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:04,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:00:04,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:04,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:04,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:04,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:04,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:04,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:04,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:00:04,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:04,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:04,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:04,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:04,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:04,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:00:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:04,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962677423] [2020-10-14 05:00:04,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:04,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:00:04,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352833429] [2020-10-14 05:00:04,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:00:04,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:04,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:00:04,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:00:04,814 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 12 states. [2020-10-14 05:00:05,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:05,197 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-14 05:00:05,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:00:05,198 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-14 05:00:05,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:05,199 INFO L225 Difference]: With dead ends: 44 [2020-10-14 05:00:05,199 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 05:00:05,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:00:05,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 05:00:05,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2020-10-14 05:00:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 05:00:05,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-14 05:00:05,206 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2020-10-14 05:00:05,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:05,206 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-14 05:00:05,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:00:05,206 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-14 05:00:05,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:00:05,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:05,207 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:05,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:00:05,208 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:05,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:05,208 INFO L82 PathProgramCache]: Analyzing trace with hash -82655559, now seen corresponding path program 3 times [2020-10-14 05:00:05,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:05,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394819885] [2020-10-14 05:00:05,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:05,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:05,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:05,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:00:05,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:05,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-14 05:00:05,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:05,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:05,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:00:05,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:05,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:00:05,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:00:05,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:05,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:05,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:05,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:05,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:05,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:00:05,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:05,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:05,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:05,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:05,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:05,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:00:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:05,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394819885] [2020-10-14 05:00:05,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:05,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:00:05,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977921916] [2020-10-14 05:00:05,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:00:05,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:05,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:00:05,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:00:05,700 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 13 states. [2020-10-14 05:00:06,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:06,049 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-14 05:00:06,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:00:06,050 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-14 05:00:06,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:06,051 INFO L225 Difference]: With dead ends: 39 [2020-10-14 05:00:06,051 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 05:00:06,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:00:06,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 05:00:06,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-14 05:00:06,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 05:00:06,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-14 05:00:06,058 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 26 [2020-10-14 05:00:06,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:06,059 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-14 05:00:06,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:00:06,059 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-14 05:00:06,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:00:06,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:06,060 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:06,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:00:06,061 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:06,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:06,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1179253650, now seen corresponding path program 4 times [2020-10-14 05:00:06,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:06,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117850557] [2020-10-14 05:00:06,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:06,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:06,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:06,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:00:06,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:06,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-14 05:00:06,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:06,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:06,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:00:06,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:06,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:00:06,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:06,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:06,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:06,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:06,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:06,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:06,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:06,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:00:06,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:06,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:06,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:06,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:06,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:06,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:06,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117850557] [2020-10-14 05:00:06,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:06,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:00:06,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665589765] [2020-10-14 05:00:06,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:00:06,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:06,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:00:06,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:00:06,655 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 13 states. [2020-10-14 05:00:07,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:07,189 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-14 05:00:07,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:00:07,190 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-14 05:00:07,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:07,190 INFO L225 Difference]: With dead ends: 45 [2020-10-14 05:00:07,191 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 05:00:07,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:00:07,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 05:00:07,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-10-14 05:00:07,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 05:00:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-14 05:00:07,205 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 28 [2020-10-14 05:00:07,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:07,205 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-14 05:00:07,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:00:07,205 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-14 05:00:07,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 05:00:07,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:07,208 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:07,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:00:07,208 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:07,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:07,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1370635575, now seen corresponding path program 5 times [2020-10-14 05:00:07,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:07,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470109272] [2020-10-14 05:00:07,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:07,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:07,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:07,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:00:07,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:07,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-14 05:00:07,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:07,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:07,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:00:07,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:07,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:00:07,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:08,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:08,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:08,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:08,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:08,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:08,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:00:08,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:08,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:08,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:08,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:08,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:08,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:08,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470109272] [2020-10-14 05:00:08,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:08,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:00:08,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914189969] [2020-10-14 05:00:08,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:00:08,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:08,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:00:08,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:00:08,103 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 14 states. [2020-10-14 05:00:08,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:08,749 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2020-10-14 05:00:08,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:00:08,749 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-14 05:00:08,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:08,751 INFO L225 Difference]: With dead ends: 55 [2020-10-14 05:00:08,751 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 05:00:08,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:00:08,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 05:00:08,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2020-10-14 05:00:08,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 05:00:08,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-14 05:00:08,759 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 29 [2020-10-14 05:00:08,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:08,759 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-14 05:00:08,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:00:08,760 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-14 05:00:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 05:00:08,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:08,761 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:08,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:00:08,761 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:08,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:08,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1682132144, now seen corresponding path program 6 times [2020-10-14 05:00:08,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:08,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024343682] [2020-10-14 05:00:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:08,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:09,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:09,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 05:00:09,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:09,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-14 05:00:09,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:09,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:09,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:00:09,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:09,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:00:09,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:09,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:09,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:09,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:09,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:09,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:09,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:00:09,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:09,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:09,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:09,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:09,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:09,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:00:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:09,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024343682] [2020-10-14 05:00:09,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:09,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:00:09,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631780437] [2020-10-14 05:00:09,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:00:09,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:09,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:00:09,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:00:09,364 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 13 states. [2020-10-14 05:00:09,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:09,776 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-10-14 05:00:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:00:09,776 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-14 05:00:09,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:09,778 INFO L225 Difference]: With dead ends: 57 [2020-10-14 05:00:09,778 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 05:00:09,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:00:09,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 05:00:09,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-14 05:00:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 05:00:09,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-14 05:00:09,789 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2020-10-14 05:00:09,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:09,790 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-14 05:00:09,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:00:09,790 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-14 05:00:09,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:00:09,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:09,791 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:09,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:00:09,791 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:09,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:09,792 INFO L82 PathProgramCache]: Analyzing trace with hash -345469767, now seen corresponding path program 7 times [2020-10-14 05:00:09,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:09,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102412074] [2020-10-14 05:00:09,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:09,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:10,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:10,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:00:10,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:10,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-14 05:00:10,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:10,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:10,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:00:10,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:10,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:00:10,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:00:10,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:10,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:10,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:10,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:10,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:10,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:00:10,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:10,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:10,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:10,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:10,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:10,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:10,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102412074] [2020-10-14 05:00:10,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:10,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:00:10,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581058271] [2020-10-14 05:00:10,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:00:10,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:10,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:00:10,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:00:10,824 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 15 states. [2020-10-14 05:00:11,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:11,418 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-14 05:00:11,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:00:11,419 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-14 05:00:11,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:11,419 INFO L225 Difference]: With dead ends: 49 [2020-10-14 05:00:11,419 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 05:00:11,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:00:11,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 05:00:11,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-14 05:00:11,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 05:00:11,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-14 05:00:11,425 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 32 [2020-10-14 05:00:11,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:11,426 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-14 05:00:11,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:00:11,426 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-14 05:00:11,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:00:11,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:11,428 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:11,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:00:11,428 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:11,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:11,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1392421246, now seen corresponding path program 8 times [2020-10-14 05:00:11,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:11,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380450388] [2020-10-14 05:00:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:11,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:11,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:11,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 05:00:11,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:11,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-10-14 05:00:11,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:11,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:11,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:00:11,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:11,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:00:11,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:00:12,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:12,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:12,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:12,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:12,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:12,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:00:12,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:12,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:12,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:12,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:12,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:12,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:00:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:12,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380450388] [2020-10-14 05:00:12,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:12,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:00:12,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389775331] [2020-10-14 05:00:12,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:00:12,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:12,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:00:12,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:00:12,315 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2020-10-14 05:00:12,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:12,989 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-14 05:00:12,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:00:12,990 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-14 05:00:12,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:12,991 INFO L225 Difference]: With dead ends: 49 [2020-10-14 05:00:12,991 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 05:00:12,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:00:12,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 05:00:13,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-14 05:00:13,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 05:00:13,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-14 05:00:13,005 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 33 [2020-10-14 05:00:13,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:13,005 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-14 05:00:13,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:00:13,006 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-14 05:00:13,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 05:00:13,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:13,008 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:13,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:00:13,008 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:13,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:13,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1143325495, now seen corresponding path program 9 times [2020-10-14 05:00:13,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:13,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245663387] [2020-10-14 05:00:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:13,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:13,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:13,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 05:00:13,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:13,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-14 05:00:13,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:13,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:13,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:00:13,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:13,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:00:13,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:14,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:14,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:14,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:14,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:14,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:14,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:00:14,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:14,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:14,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:14,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:14,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:14,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:14,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245663387] [2020-10-14 05:00:14,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:14,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:00:14,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034342875] [2020-10-14 05:00:14,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:00:14,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:14,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:00:14,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:00:14,036 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2020-10-14 05:00:14,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:14,893 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-14 05:00:14,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:00:14,893 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-14 05:00:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:14,894 INFO L225 Difference]: With dead ends: 54 [2020-10-14 05:00:14,894 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 05:00:14,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:00:14,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 05:00:14,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2020-10-14 05:00:14,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 05:00:14,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-14 05:00:14,903 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 35 [2020-10-14 05:00:14,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:14,903 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-14 05:00:14,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:00:14,903 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-14 05:00:14,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:00:14,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:14,904 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:14,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:00:14,905 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:14,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:14,905 INFO L82 PathProgramCache]: Analyzing trace with hash -822332832, now seen corresponding path program 10 times [2020-10-14 05:00:14,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:14,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129044614] [2020-10-14 05:00:14,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:14,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:15,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:15,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:00:15,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:15,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-14 05:00:15,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:15,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:15,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:00:15,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:15,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:00:15,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:00:15,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:15,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:15,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:15,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:15,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:15,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:00:15,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:15,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:15,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:15,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:15,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:15,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:15,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129044614] [2020-10-14 05:00:15,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:15,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:00:15,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063717106] [2020-10-14 05:00:15,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:00:15,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:15,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:00:15,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:00:15,921 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 17 states. [2020-10-14 05:00:16,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:16,438 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-14 05:00:16,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:00:16,439 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2020-10-14 05:00:16,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:16,439 INFO L225 Difference]: With dead ends: 55 [2020-10-14 05:00:16,440 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 05:00:16,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:00:16,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 05:00:16,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2020-10-14 05:00:16,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 05:00:16,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-14 05:00:16,447 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 36 [2020-10-14 05:00:16,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:16,448 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-14 05:00:16,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:00:16,448 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-14 05:00:16,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:00:16,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:16,449 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:16,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:00:16,449 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:16,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:16,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1714302279, now seen corresponding path program 11 times [2020-10-14 05:00:16,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:16,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626966729] [2020-10-14 05:00:16,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:16,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:16,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:16,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:00:16,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:16,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-10-14 05:00:16,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:16,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:16,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:00:16,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:16,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 05:00:16,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:17,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:17,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:17,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:17,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:17,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:17,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:00:17,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:17,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:17,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:17,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:17,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:17,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:17,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626966729] [2020-10-14 05:00:17,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:17,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:00:17,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364078407] [2020-10-14 05:00:17,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:00:17,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:17,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:00:17,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:00:17,448 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 16 states. [2020-10-14 05:00:18,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:18,006 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-14 05:00:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:00:18,007 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-14 05:00:18,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:18,008 INFO L225 Difference]: With dead ends: 61 [2020-10-14 05:00:18,008 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 05:00:18,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:00:18,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 05:00:18,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-14 05:00:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 05:00:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-14 05:00:18,015 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2020-10-14 05:00:18,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:18,015 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-14 05:00:18,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:00:18,016 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-14 05:00:18,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 05:00:18,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:18,017 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:18,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:00:18,017 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:18,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:18,017 INFO L82 PathProgramCache]: Analyzing trace with hash 380920258, now seen corresponding path program 12 times [2020-10-14 05:00:18,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:18,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850629577] [2020-10-14 05:00:18,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:18,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:18,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:18,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 05:00:18,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:18,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-14 05:00:18,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:18,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:18,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:00:18,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:18,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 05:00:18,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:19,059 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-14 05:00:19,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:19,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:19,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:19,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:19,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:19,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:00:19,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:19,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:19,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:19,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:19,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:19,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:19,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850629577] [2020-10-14 05:00:19,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:19,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:00:19,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605839466] [2020-10-14 05:00:19,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:00:19,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:19,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:00:19,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:00:19,519 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2020-10-14 05:00:20,091 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-14 05:00:20,384 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2020-10-14 05:00:20,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:20,818 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-14 05:00:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:00:20,820 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-10-14 05:00:20,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:20,820 INFO L225 Difference]: With dead ends: 61 [2020-10-14 05:00:20,820 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 05:00:20,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:00:20,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 05:00:20,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2020-10-14 05:00:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 05:00:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-14 05:00:20,828 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 39 [2020-10-14 05:00:20,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:20,828 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-14 05:00:20,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:00:20,829 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-14 05:00:20,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:00:20,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:20,829 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:20,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:00:20,830 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:20,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:20,830 INFO L82 PathProgramCache]: Analyzing trace with hash 696672032, now seen corresponding path program 13 times [2020-10-14 05:00:20,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:20,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054321693] [2020-10-14 05:00:20,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:20,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:21,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:21,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:00:21,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:21,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-10-14 05:00:21,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:21,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:21,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:00:21,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:21,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 05:00:21,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:21,949 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-14 05:00:22,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:22,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:22,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:22,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:22,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:22,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:00:22,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:22,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:22,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:22,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:22,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:22,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:22,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054321693] [2020-10-14 05:00:22,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:22,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:00:22,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336124153] [2020-10-14 05:00:22,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:00:22,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:22,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:00:22,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:00:22,529 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 19 states. [2020-10-14 05:00:23,243 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-10-14 05:00:23,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:23,811 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-14 05:00:23,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:00:23,811 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-14 05:00:23,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:23,812 INFO L225 Difference]: With dead ends: 64 [2020-10-14 05:00:23,812 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 05:00:23,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:00:23,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 05:00:23,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-14 05:00:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 05:00:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-14 05:00:23,826 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 42 [2020-10-14 05:00:23,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:23,828 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-14 05:00:23,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:00:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-14 05:00:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 05:00:23,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:23,830 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:23,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:00:23,831 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:23,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:23,831 INFO L82 PathProgramCache]: Analyzing trace with hash 2106679867, now seen corresponding path program 14 times [2020-10-14 05:00:23,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:23,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332921994] [2020-10-14 05:00:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:23,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:24,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:24,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 05:00:24,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:24,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 741 [2020-10-14 05:00:24,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:24,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:24,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:00:24,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:24,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 05:00:24,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:25,088 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-14 05:00:25,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:25,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:25,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:25,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:25,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:25,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:00:25,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:25,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:25,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:25,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:25,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:25,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:25,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332921994] [2020-10-14 05:00:25,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:25,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:00:25,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937614309] [2020-10-14 05:00:25,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:00:25,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:25,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:00:25,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:00:25,881 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 20 states. [2020-10-14 05:00:26,679 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-14 05:00:26,952 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-10-14 05:00:27,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:27,529 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2020-10-14 05:00:27,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:00:27,529 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2020-10-14 05:00:27,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:27,530 INFO L225 Difference]: With dead ends: 78 [2020-10-14 05:00:27,530 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 05:00:27,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:00:27,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 05:00:27,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 56. [2020-10-14 05:00:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 05:00:27,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-10-14 05:00:27,536 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 43 [2020-10-14 05:00:27,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:27,537 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-10-14 05:00:27,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:00:27,537 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-10-14 05:00:27,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 05:00:27,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:27,538 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:27,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:00:27,538 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:27,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:27,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1279393026, now seen corresponding path program 15 times [2020-10-14 05:00:27,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:27,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790274912] [2020-10-14 05:00:27,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:27,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:28,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:28,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 05:00:28,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:28,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 582 [2020-10-14 05:00:28,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:28,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:28,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:00:28,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:28,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 05:00:28,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:29,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:29,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:29,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:29,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:29,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:29,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:00:29,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:29,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:29,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:29,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:29,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:29,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:29,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790274912] [2020-10-14 05:00:29,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:29,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:00:29,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799371378] [2020-10-14 05:00:29,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:00:29,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:29,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:00:29,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:00:29,153 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 19 states. [2020-10-14 05:00:29,802 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-14 05:00:30,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:30,410 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2020-10-14 05:00:30,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:00:30,411 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-14 05:00:30,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:30,412 INFO L225 Difference]: With dead ends: 77 [2020-10-14 05:00:30,412 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 05:00:30,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:00:30,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 05:00:30,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-14 05:00:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 05:00:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-14 05:00:30,419 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2020-10-14 05:00:30,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:30,420 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-14 05:00:30,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:00:30,420 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-14 05:00:30,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:00:30,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:30,420 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:30,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:00:30,421 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:30,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2042650631, now seen corresponding path program 16 times [2020-10-14 05:00:30,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:30,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378526818] [2020-10-14 05:00:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:30,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:31,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:31,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:00:31,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:31,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 879 [2020-10-14 05:00:31,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:31,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:31,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:00:31,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:31,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 05:00:31,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:31,967 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-14 05:00:32,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:32,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:32,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:32,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:32,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:32,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:00:32,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:32,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:32,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:32,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:32,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:32,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:32,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378526818] [2020-10-14 05:00:32,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:32,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:00:32,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813179822] [2020-10-14 05:00:32,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:00:32,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:32,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:00:32,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:00:32,497 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 21 states. [2020-10-14 05:00:33,146 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2020-10-14 05:00:33,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:33,646 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-14 05:00:33,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:00:33,649 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-14 05:00:33,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:33,650 INFO L225 Difference]: With dead ends: 68 [2020-10-14 05:00:33,650 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 05:00:33,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:00:33,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 05:00:33,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2020-10-14 05:00:33,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 05:00:33,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-14 05:00:33,656 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 46 [2020-10-14 05:00:33,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:33,656 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-14 05:00:33,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:00:33,657 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-14 05:00:33,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 05:00:33,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:33,657 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:33,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:00:33,658 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:33,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:33,658 INFO L82 PathProgramCache]: Analyzing trace with hash 882343476, now seen corresponding path program 17 times [2020-10-14 05:00:33,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:33,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763468096] [2020-10-14 05:00:33,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:33,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:34,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:34,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 05:00:34,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:34,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 850 [2020-10-14 05:00:34,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:34,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:34,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:00:34,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:34,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 05:00:34,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:00:35,237 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-10-14 05:00:35,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:35,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:35,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:35,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:35,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:35,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:00:35,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:35,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:35,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:35,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:35,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:35,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:36,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763468096] [2020-10-14 05:00:36,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:36,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:00:36,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572441606] [2020-10-14 05:00:36,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:00:36,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:36,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:00:36,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:00:36,025 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2020-10-14 05:00:36,616 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-10-14 05:00:36,811 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 65 [2020-10-14 05:00:37,011 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 68 [2020-10-14 05:00:37,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:37,350 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-14 05:00:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:00:37,351 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2020-10-14 05:00:37,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:37,352 INFO L225 Difference]: With dead ends: 69 [2020-10-14 05:00:37,352 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 05:00:37,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:00:37,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 05:00:37,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-14 05:00:37,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 05:00:37,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-14 05:00:37,361 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 47 [2020-10-14 05:00:37,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:37,361 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-14 05:00:37,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:00:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-14 05:00:37,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 05:00:37,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:37,362 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:37,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:00:37,362 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:37,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:37,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1513160379, now seen corresponding path program 18 times [2020-10-14 05:00:37,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:37,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451167001] [2020-10-14 05:00:37,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:37,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:38,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:38,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 05:00:38,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:38,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 886 [2020-10-14 05:00:38,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:38,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:38,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:00:38,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:38,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 05:00:38,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:38,788 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-14 05:00:39,067 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-10-14 05:00:39,203 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-14 05:00:39,364 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-14 05:00:39,503 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-14 05:00:39,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:39,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:39,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:39,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:39,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:39,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:00:39,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:39,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:39,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:39,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:39,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:39,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:39,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451167001] [2020-10-14 05:00:39,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:39,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:00:39,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12657377] [2020-10-14 05:00:39,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:00:39,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:39,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:00:39,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:00:39,958 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2020-10-14 05:00:40,767 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 05:00:41,147 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 81 [2020-10-14 05:00:41,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:41,890 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-14 05:00:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:00:41,891 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-14 05:00:41,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:41,892 INFO L225 Difference]: With dead ends: 74 [2020-10-14 05:00:41,892 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 05:00:41,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=139, Invalid=1343, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:00:41,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 05:00:41,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-14 05:00:41,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 05:00:41,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-14 05:00:41,902 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-10-14 05:00:41,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:41,902 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-14 05:00:41,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:00:41,902 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-14 05:00:41,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 05:00:41,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:41,903 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:41,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:00:41,903 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:41,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:41,904 INFO L82 PathProgramCache]: Analyzing trace with hash 699503982, now seen corresponding path program 19 times [2020-10-14 05:00:41,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:41,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842449943] [2020-10-14 05:00:41,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:42,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:42,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:42,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:00:42,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:42,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 927 [2020-10-14 05:00:42,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:42,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:42,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:00:42,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:42,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 05:00:42,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:43,163 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-14 05:00:43,320 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-14 05:00:43,492 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-14 05:00:43,701 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-14 05:00:43,892 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-14 05:00:44,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:44,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:44,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:44,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:44,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:44,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:00:44,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:44,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:44,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:44,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:44,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:44,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:44,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842449943] [2020-10-14 05:00:44,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:44,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:00:44,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640160998] [2020-10-14 05:00:44,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:00:44,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:44,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:00:44,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:00:44,277 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 23 states. [2020-10-14 05:00:45,055 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 85 [2020-10-14 05:00:45,429 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 85 [2020-10-14 05:00:45,816 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 88 [2020-10-14 05:00:46,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:46,143 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-14 05:00:46,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:00:46,144 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-14 05:00:46,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:46,145 INFO L225 Difference]: With dead ends: 77 [2020-10-14 05:00:46,145 INFO L226 Difference]: Without dead ends: 75 [2020-10-14 05:00:46,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:00:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-14 05:00:46,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2020-10-14 05:00:46,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 05:00:46,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-14 05:00:46,153 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 50 [2020-10-14 05:00:46,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:46,153 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-14 05:00:46,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:00:46,153 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-14 05:00:46,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 05:00:46,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:46,153 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:46,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:00:46,154 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:46,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:46,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1411026041, now seen corresponding path program 20 times [2020-10-14 05:00:46,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:46,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996609301] [2020-10-14 05:00:46,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:46,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:46,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:46,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 05:00:46,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:46,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 732 [2020-10-14 05:00:46,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:46,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:46,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:00:46,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:46,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 05:00:46,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:47,465 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-14 05:00:47,678 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-14 05:00:47,813 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-14 05:00:48,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:48,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:48,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:48,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:48,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:48,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:00:48,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:48,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:48,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:48,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:48,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:48,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 6 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:48,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996609301] [2020-10-14 05:00:48,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:48,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:00:48,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514034882] [2020-10-14 05:00:48,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:00:48,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:48,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:00:48,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:00:48,534 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 22 states. [2020-10-14 05:00:48,964 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-14 05:00:49,297 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 74 [2020-10-14 05:00:49,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:49,979 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-14 05:00:49,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:00:49,979 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-14 05:00:49,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:49,980 INFO L225 Difference]: With dead ends: 81 [2020-10-14 05:00:49,980 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 05:00:49,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:00:49,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 05:00:49,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-14 05:00:49,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 05:00:49,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-14 05:00:49,988 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2020-10-14 05:00:49,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:49,988 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-14 05:00:49,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:00:49,988 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-14 05:00:49,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 05:00:49,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:49,989 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:49,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:00:49,989 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:49,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:49,990 INFO L82 PathProgramCache]: Analyzing trace with hash -253330444, now seen corresponding path program 21 times [2020-10-14 05:00:49,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:49,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972168155] [2020-10-14 05:00:49,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:50,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:50,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:50,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:00:50,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:50,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-10-14 05:00:50,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:50,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:50,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:00:50,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:50,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 05:00:50,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:51,283 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-14 05:00:51,622 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-14 05:00:51,750 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-14 05:00:52,113 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-14 05:00:52,325 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-14 05:00:52,638 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-10-14 05:00:52,809 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 05:00:53,107 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-14 05:00:53,372 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-14 05:00:53,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:00:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:53,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:53,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:53,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:00:53,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:53,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:00:53,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:53,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:53,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:00:53,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:00:53,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:00:53,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:00:53,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972168155] [2020-10-14 05:00:53,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:00:53,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:00:53,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007623071] [2020-10-14 05:00:53,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:00:53,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:00:53,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:00:53,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:00:53,976 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 24 states. [2020-10-14 05:00:54,738 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-14 05:00:55,151 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-14 05:00:55,338 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-14 05:00:55,733 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 94 [2020-10-14 05:00:55,946 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 05:00:56,446 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 96 [2020-10-14 05:00:56,899 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-14 05:00:57,086 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-14 05:00:57,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:00:57,702 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-14 05:00:57,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:00:57,703 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-14 05:00:57,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:00:57,704 INFO L225 Difference]: With dead ends: 81 [2020-10-14 05:00:57,704 INFO L226 Difference]: Without dead ends: 79 [2020-10-14 05:00:57,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=172, Invalid=1808, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:00:57,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-14 05:00:57,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2020-10-14 05:00:57,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 05:00:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-14 05:00:57,715 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 53 [2020-10-14 05:00:57,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:00:57,715 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-14 05:00:57,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:00:57,716 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-14 05:00:57,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 05:00:57,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:00:57,716 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:00:57,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:00:57,717 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:00:57,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:00:57,717 INFO L82 PathProgramCache]: Analyzing trace with hash -704856146, now seen corresponding path program 22 times [2020-10-14 05:00:57,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:00:57,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762671031] [2020-10-14 05:00:57,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:00:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:00:57,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:00:58,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:00:58,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:00:58,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:00:58,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 948 [2020-10-14 05:00:58,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:00:58,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:00:58,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:00:58,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:00:58,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 05:00:58,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:00:59,426 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-14 05:00:59,610 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-14 05:00:59,818 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-14 05:01:00,181 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-14 05:01:00,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:00,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:00,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:00,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:00,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:00,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:01:00,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:00,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:00,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:00,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:00,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:00,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:00,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762671031] [2020-10-14 05:01:00,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:00,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:01:00,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187610854] [2020-10-14 05:01:00,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:01:00,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:00,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:01:00,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:01:00,634 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 25 states. [2020-10-14 05:01:01,466 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-14 05:01:01,837 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-14 05:01:02,023 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 05:01:02,360 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 91 [2020-10-14 05:01:02,711 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-14 05:01:03,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:03,396 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-14 05:01:03,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:01:03,397 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-14 05:01:03,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:03,398 INFO L225 Difference]: With dead ends: 84 [2020-10-14 05:01:03,398 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 05:01:03,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=162, Invalid=1818, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:01:03,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 05:01:03,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2020-10-14 05:01:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 05:01:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-14 05:01:03,409 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 56 [2020-10-14 05:01:03,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:03,410 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-14 05:01:03,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:01:03,410 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-14 05:01:03,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 05:01:03,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:03,411 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:01:03,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:01:03,411 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:03,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:03,411 INFO L82 PathProgramCache]: Analyzing trace with hash 163099821, now seen corresponding path program 23 times [2020-10-14 05:01:03,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:03,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065017731] [2020-10-14 05:01:03,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:03,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:04,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:04,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 05:01:04,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:04,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 868 [2020-10-14 05:01:04,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:04,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:04,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:01:04,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:01:04,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 05:01:04,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:05,107 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-14 05:01:05,447 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-14 05:01:05,716 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-10-14 05:01:06,038 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-14 05:01:06,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:06,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:06,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:06,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:06,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:06,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:01:06,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:06,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:06,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:06,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:06,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:06,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:06,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065017731] [2020-10-14 05:01:06,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:06,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:01:06,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628331497] [2020-10-14 05:01:06,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:01:06,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:06,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:01:06,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:01:06,644 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 26 states. [2020-10-14 05:01:07,700 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 82 [2020-10-14 05:01:08,149 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 97 [2020-10-14 05:01:09,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:09,008 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-10-14 05:01:09,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 05:01:09,008 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-10-14 05:01:09,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:09,009 INFO L225 Difference]: With dead ends: 104 [2020-10-14 05:01:09,009 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 05:01:09,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=167, Invalid=1639, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 05:01:09,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 05:01:09,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 70. [2020-10-14 05:01:09,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 05:01:09,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-14 05:01:09,019 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 57 [2020-10-14 05:01:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:09,019 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-14 05:01:09,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:01:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-14 05:01:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 05:01:09,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:09,020 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:01:09,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:01:09,021 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:09,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:09,021 INFO L82 PathProgramCache]: Analyzing trace with hash -269473356, now seen corresponding path program 24 times [2020-10-14 05:01:09,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:09,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767485326] [2020-10-14 05:01:09,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:09,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:10,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:10,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 05:01:10,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:10,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 962 [2020-10-14 05:01:10,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:10,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:10,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:01:10,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:01:10,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 05:01:10,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:10,795 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-14 05:01:11,001 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-10-14 05:01:11,135 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-14 05:01:11,308 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-14 05:01:11,447 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-14 05:01:12,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:12,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:12,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:12,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:12,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:12,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:01:12,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:12,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:12,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:12,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:12,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:12,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 7 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:12,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767485326] [2020-10-14 05:01:12,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:12,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:01:12,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509892879] [2020-10-14 05:01:12,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:01:12,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:12,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:01:12,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:01:12,121 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 25 states. [2020-10-14 05:01:13,142 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 05:01:13,596 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 88 [2020-10-14 05:01:14,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:14,454 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2020-10-14 05:01:14,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:01:14,455 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-14 05:01:14,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:14,456 INFO L225 Difference]: With dead ends: 97 [2020-10-14 05:01:14,456 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 05:01:14,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:01:14,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 05:01:14,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-10-14 05:01:14,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 05:01:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-14 05:01:14,468 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2020-10-14 05:01:14,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:14,469 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-14 05:01:14,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:01:14,469 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-14 05:01:14,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:01:14,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:14,469 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:01:14,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:01:14,470 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:14,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:14,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1303617621, now seen corresponding path program 25 times [2020-10-14 05:01:14,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:14,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032323955] [2020-10-14 05:01:14,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:14,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:16,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:16,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:01:16,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:16,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1825 [2020-10-14 05:01:16,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:16,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:16,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:01:16,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:01:16,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 05:01:16,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:17,185 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-14 05:01:17,521 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-10-14 05:01:17,674 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-14 05:01:17,910 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2020-10-14 05:01:18,139 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2020-10-14 05:01:18,356 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2020-10-14 05:01:18,537 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-10-14 05:01:19,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:19,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:19,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:19,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:19,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:19,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:01:19,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:19,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:19,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:19,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:19,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:19,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:19,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032323955] [2020-10-14 05:01:19,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:19,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:01:19,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523378692] [2020-10-14 05:01:19,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:01:19,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:19,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:01:19,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:01:19,101 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 27 states. [2020-10-14 05:01:19,903 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-14 05:01:20,192 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-14 05:01:20,551 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 94 [2020-10-14 05:01:20,921 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 98 [2020-10-14 05:01:21,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:21,973 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-14 05:01:21,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:01:21,974 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-14 05:01:21,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:21,975 INFO L225 Difference]: With dead ends: 88 [2020-10-14 05:01:21,975 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 05:01:21,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=172, Invalid=1720, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 05:01:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 05:01:21,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2020-10-14 05:01:21,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 05:01:21,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-14 05:01:21,988 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 60 [2020-10-14 05:01:21,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:21,988 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-14 05:01:21,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:01:21,989 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-14 05:01:21,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 05:01:21,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:21,989 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:01:21,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:01:21,990 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:21,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:21,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1998722842, now seen corresponding path program 26 times [2020-10-14 05:01:21,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:21,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474894255] [2020-10-14 05:01:21,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:22,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:23,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:23,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 05:01:23,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:23,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1430 [2020-10-14 05:01:23,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:23,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:01:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:01:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 05:01:23,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:24,077 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-14 05:01:24,287 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-14 05:01:24,577 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-14 05:01:24,736 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-14 05:01:24,958 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2020-10-14 05:01:25,522 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-14 05:01:26,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:26,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:26,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:26,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:26,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:26,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:01:26,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:26,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:26,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:26,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:26,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:26,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:26,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474894255] [2020-10-14 05:01:26,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:26,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:01:26,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000834440] [2020-10-14 05:01:26,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:01:26,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:26,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:01:26,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:01:26,147 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 28 states. [2020-10-14 05:01:27,094 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 79 [2020-10-14 05:01:27,305 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 05:01:27,545 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-14 05:01:27,899 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 97 [2020-10-14 05:01:28,266 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 102 [2020-10-14 05:01:28,685 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 94 [2020-10-14 05:01:29,110 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 99 [2020-10-14 05:01:29,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:29,837 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-14 05:01:29,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 05:01:29,837 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 61 [2020-10-14 05:01:29,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:29,838 INFO L225 Difference]: With dead ends: 89 [2020-10-14 05:01:29,838 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 05:01:29,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=188, Invalid=1882, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 05:01:29,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 05:01:29,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-10-14 05:01:29,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 05:01:29,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-14 05:01:29,851 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 61 [2020-10-14 05:01:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:29,851 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-14 05:01:29,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:01:29,852 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-14 05:01:29,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 05:01:29,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:29,852 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:01:29,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:01:29,852 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:29,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:29,853 INFO L82 PathProgramCache]: Analyzing trace with hash 983118765, now seen corresponding path program 27 times [2020-10-14 05:01:29,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:29,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469487050] [2020-10-14 05:01:29,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:29,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:31,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:31,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 05:01:31,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:31,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1626 [2020-10-14 05:01:31,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:31,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:31,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:01:31,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:01:31,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 05:01:31,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:32,193 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-14 05:01:32,322 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-14 05:01:32,511 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-14 05:01:32,642 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-14 05:01:32,875 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2020-10-14 05:01:33,038 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-14 05:01:33,424 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2020-10-14 05:01:33,625 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2020-10-14 05:01:33,842 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2020-10-14 05:01:34,038 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-14 05:01:34,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:34,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:34,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:34,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:34,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:34,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:01:34,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:34,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:34,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:34,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:34,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:34,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:34,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469487050] [2020-10-14 05:01:34,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:34,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:01:34,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070667197] [2020-10-14 05:01:34,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:01:34,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:34,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:01:34,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:01:34,770 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 28 states. [2020-10-14 05:01:36,067 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2020-10-14 05:01:36,319 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-14 05:01:36,695 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 105 [2020-10-14 05:01:37,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:37,931 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-14 05:01:37,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:01:37,932 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-14 05:01:37,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:37,933 INFO L225 Difference]: With dead ends: 94 [2020-10-14 05:01:37,933 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 05:01:37,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=173, Invalid=1989, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 05:01:37,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 05:01:37,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2020-10-14 05:01:37,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 05:01:37,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-14 05:01:37,948 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 63 [2020-10-14 05:01:37,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:37,948 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-14 05:01:37,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:01:37,949 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-14 05:01:37,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:01:37,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:37,949 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:01:37,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:01:37,950 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:37,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:37,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1479267708, now seen corresponding path program 28 times [2020-10-14 05:01:37,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:37,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042056402] [2020-10-14 05:01:37,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:38,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:39,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:39,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:01:39,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:39,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1618 [2020-10-14 05:01:39,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:39,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:39,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:01:39,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:01:39,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 05:01:39,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:40,247 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-14 05:01:40,500 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 05:01:40,821 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-14 05:01:41,068 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-14 05:01:41,292 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-10-14 05:01:41,512 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-10-14 05:01:41,673 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-14 05:01:42,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:42,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:42,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:42,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:42,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:42,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:01:42,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:42,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:42,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:42,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:42,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:42,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:42,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042056402] [2020-10-14 05:01:42,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:42,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 05:01:42,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435473040] [2020-10-14 05:01:42,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 05:01:42,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:42,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 05:01:42,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:01:42,381 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 29 states. [2020-10-14 05:01:43,234 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-14 05:01:43,541 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-14 05:01:43,885 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-14 05:01:44,325 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 97 [2020-10-14 05:01:44,750 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 109 [2020-10-14 05:01:45,218 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 113 [2020-10-14 05:01:45,860 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-14 05:01:46,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:46,526 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2020-10-14 05:01:46,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:01:46,527 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-14 05:01:46,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:46,528 INFO L225 Difference]: With dead ends: 117 [2020-10-14 05:01:46,528 INFO L226 Difference]: Without dead ends: 115 [2020-10-14 05:01:46,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=196, Invalid=2060, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 05:01:46,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-14 05:01:46,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 77. [2020-10-14 05:01:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 05:01:46,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-10-14 05:01:46,543 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 64 [2020-10-14 05:01:46,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:46,543 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-10-14 05:01:46,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 05:01:46,544 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-10-14 05:01:46,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 05:01:46,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:46,544 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:01:46,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:01:46,544 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:46,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:46,545 INFO L82 PathProgramCache]: Analyzing trace with hash 713998677, now seen corresponding path program 29 times [2020-10-14 05:01:46,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:46,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314298707] [2020-10-14 05:01:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:46,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:47,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:47,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 05:01:47,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:47,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1269 [2020-10-14 05:01:47,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:47,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:47,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:01:47,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:01:47,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 05:01:47,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:48,690 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-14 05:01:49,018 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-14 05:01:49,164 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-14 05:01:49,391 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2020-10-14 05:01:49,563 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-10-14 05:01:49,755 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-14 05:01:50,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:50,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:50,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:50,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:50,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:50,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:01:50,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:50,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:50,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:50,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:50,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:50,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 8 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:50,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314298707] [2020-10-14 05:01:50,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:50,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:01:50,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144172406] [2020-10-14 05:01:50,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:01:50,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:50,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:01:50,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:01:50,787 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 28 states. [2020-10-14 05:01:51,318 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-14 05:01:51,710 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 05:01:52,169 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-14 05:01:52,387 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 05:01:52,727 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 98 [2020-10-14 05:01:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:53,870 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-10-14 05:01:53,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:01:53,870 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-10-14 05:01:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:53,871 INFO L225 Difference]: With dead ends: 107 [2020-10-14 05:01:53,871 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 05:01:53,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=141, Invalid=1839, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:01:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 05:01:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-10-14 05:01:53,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 05:01:53,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-14 05:01:53,884 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 66 [2020-10-14 05:01:53,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:53,885 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-14 05:01:53,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:01:53,885 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-14 05:01:53,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 05:01:53,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:53,885 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:01:53,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:01:53,886 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:53,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:53,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1790273242, now seen corresponding path program 30 times [2020-10-14 05:01:53,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:53,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731496751] [2020-10-14 05:01:53,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:54,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:55,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:55,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 05:01:55,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:55,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1699 [2020-10-14 05:01:55,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:55,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:55,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:01:55,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:01:55,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 05:01:55,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:56,059 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-14 05:01:56,261 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-14 05:01:56,512 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-14 05:01:56,850 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-14 05:01:56,992 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-14 05:01:57,244 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2020-10-14 05:01:57,430 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-14 05:01:57,742 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 92 [2020-10-14 05:01:57,943 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-14 05:01:58,171 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-14 05:01:58,380 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-10-14 05:01:59,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:59,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:59,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:59,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:59,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:59,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:01:59,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:59,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:59,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:59,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:59,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:59,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:59,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731496751] [2020-10-14 05:01:59,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:59,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:01:59,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940176170] [2020-10-14 05:01:59,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:01:59,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:59,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:01:59,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:01:59,332 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 30 states. [2020-10-14 05:02:00,347 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 79 [2020-10-14 05:02:00,833 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-10-14 05:02:01,053 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 05:02:01,444 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2020-10-14 05:02:01,686 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-14 05:02:02,105 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 113 [2020-10-14 05:02:03,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:03,391 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-14 05:02:03,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:02:03,392 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-14 05:02:03,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:03,393 INFO L225 Difference]: With dead ends: 98 [2020-10-14 05:02:03,393 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 05:02:03,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=201, Invalid=2451, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 05:02:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 05:02:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2020-10-14 05:02:03,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 05:02:03,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-14 05:02:03,408 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-10-14 05:02:03,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:03,408 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-14 05:02:03,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:02:03,408 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-14 05:02:03,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 05:02:03,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:03,409 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:02:03,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:02:03,409 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:03,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:03,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1403461411, now seen corresponding path program 31 times [2020-10-14 05:02:03,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:03,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595762451] [2020-10-14 05:02:03,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:03,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:05,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:05,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 05:02:05,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:05,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1998 [2020-10-14 05:02:05,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:05,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:05,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:02:05,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:02:05,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 05:02:05,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:06,085 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-14 05:02:06,577 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-14 05:02:06,941 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2020-10-14 05:02:07,124 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-10-14 05:02:07,429 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 98 [2020-10-14 05:02:07,661 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2020-10-14 05:02:07,873 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-14 05:02:08,059 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-10-14 05:02:08,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:08,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:08,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:08,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:08,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:08,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:02:08,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:08,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:08,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:08,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:08,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:08,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 2 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:02:08,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595762451] [2020-10-14 05:02:08,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:08,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:02:08,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954059590] [2020-10-14 05:02:08,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:02:08,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:08,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:02:08,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:02:08,864 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 31 states. [2020-10-14 05:02:10,394 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 91 [2020-10-14 05:02:10,636 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-10-14 05:02:11,091 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 119 [2020-10-14 05:02:11,669 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 125 [2020-10-14 05:02:12,274 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 127 [2020-10-14 05:02:13,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:13,181 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-10-14 05:02:13,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:02:13,182 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-14 05:02:13,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:13,183 INFO L225 Difference]: With dead ends: 99 [2020-10-14 05:02:13,183 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 05:02:13,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=199, Invalid=2251, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 05:02:13,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 05:02:13,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 76. [2020-10-14 05:02:13,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 05:02:13,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-14 05:02:13,198 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 68 [2020-10-14 05:02:13,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:13,198 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-14 05:02:13,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:02:13,198 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-14 05:02:13,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 05:02:13,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:13,198 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:02:13,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:02:13,199 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:13,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:13,199 INFO L82 PathProgramCache]: Analyzing trace with hash 878591292, now seen corresponding path program 32 times [2020-10-14 05:02:13,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:13,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529049547] [2020-10-14 05:02:13,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:13,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:14,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:14,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 05:02:14,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:14,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1684 [2020-10-14 05:02:14,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:14,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:14,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:02:14,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:02:14,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 05:02:14,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:15,715 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-14 05:02:15,968 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2020-10-14 05:02:16,142 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-14 05:02:16,454 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2020-10-14 05:02:16,683 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-10-14 05:02:17,048 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2020-10-14 05:02:17,247 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-14 05:02:17,748 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 124 [2020-10-14 05:02:17,998 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-14 05:02:18,502 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-14 05:02:19,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:19,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:19,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:19,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:19,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:19,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:02:19,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:19,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:19,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:19,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:19,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:19,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:02:19,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529049547] [2020-10-14 05:02:19,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:19,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:02:19,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861876179] [2020-10-14 05:02:19,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:02:19,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:19,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:02:19,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:02:19,718 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 31 states. [2020-10-14 05:02:20,476 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-14 05:02:20,980 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 05:02:21,298 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-14 05:02:21,762 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 114 [2020-10-14 05:02:22,126 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-10-14 05:02:22,849 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 149 [2020-10-14 05:02:23,329 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 112 [2020-10-14 05:02:24,513 WARN L193 SmtUtils]: Spent 951.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 183 [2020-10-14 05:02:25,113 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 132 [2020-10-14 05:02:27,380 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 233 DAG size of output: 212 [2020-10-14 05:02:29,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:29,352 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-10-14 05:02:29,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 05:02:29,353 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-14 05:02:29,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:29,354 INFO L225 Difference]: With dead ends: 104 [2020-10-14 05:02:29,354 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 05:02:29,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=202, Invalid=2878, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 05:02:29,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 05:02:29,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 79. [2020-10-14 05:02:29,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 05:02:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-14 05:02:29,371 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 70 [2020-10-14 05:02:29,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:29,372 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-14 05:02:29,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:02:29,372 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-14 05:02:29,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 05:02:29,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:29,372 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:02:29,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:02:29,373 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:29,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:29,373 INFO L82 PathProgramCache]: Analyzing trace with hash -982869473, now seen corresponding path program 33 times [2020-10-14 05:02:29,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:29,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969935882] [2020-10-14 05:02:29,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:29,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:31,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:31,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 05:02:31,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:31,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2018 [2020-10-14 05:02:31,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:31,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:31,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 05:02:31,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:02:31,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-14 05:02:31,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:32,279 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-14 05:02:32,595 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-14 05:02:32,974 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-14 05:02:33,174 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-14 05:02:33,477 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-10-14 05:02:33,716 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-10-14 05:02:34,085 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2020-10-14 05:02:34,383 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-10-14 05:02:34,656 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2020-10-14 05:02:34,889 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-14 05:02:35,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:35,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:35,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:35,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:35,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:35,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:02:35,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:35,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:35,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:35,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:35,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:35,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:02:35,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969935882] [2020-10-14 05:02:35,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:35,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 05:02:35,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700830281] [2020-10-14 05:02:35,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 05:02:35,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:35,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 05:02:35,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:02:35,775 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 32 states. [2020-10-14 05:02:37,141 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-14 05:02:37,459 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-14 05:02:38,042 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 110 [2020-10-14 05:02:38,541 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 108 [2020-10-14 05:02:39,067 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 111 [2020-10-14 05:02:39,764 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-14 05:02:40,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:40,629 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2020-10-14 05:02:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 05:02:40,630 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-14 05:02:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:40,631 INFO L225 Difference]: With dead ends: 130 [2020-10-14 05:02:40,631 INFO L226 Difference]: Without dead ends: 128 [2020-10-14 05:02:40,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=221, Invalid=2535, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 05:02:40,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-14 05:02:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 84. [2020-10-14 05:02:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-14 05:02:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2020-10-14 05:02:40,648 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 71 [2020-10-14 05:02:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:40,648 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2020-10-14 05:02:40,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 05:02:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2020-10-14 05:02:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 05:02:40,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:40,649 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:02:40,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:02:40,649 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:40,650 INFO L82 PathProgramCache]: Analyzing trace with hash 587340134, now seen corresponding path program 34 times [2020-10-14 05:02:40,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:40,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496214303] [2020-10-14 05:02:40,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:40,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:42,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:42,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 05:02:42,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:42,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1635 [2020-10-14 05:02:42,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:42,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:42,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:02:42,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:02:42,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 05:02:42,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:43,066 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-14 05:02:43,314 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-14 05:02:43,522 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-10-14 05:02:43,929 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 86 [2020-10-14 05:02:44,108 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-14 05:02:44,493 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2020-10-14 05:02:44,703 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-10-14 05:02:44,950 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-10-14 05:02:45,201 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-10-14 05:02:45,371 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-14 05:02:46,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:46,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:46,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:46,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:46,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:46,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:02:46,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:46,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:46,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:46,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:46,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:46,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 9 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:02:46,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496214303] [2020-10-14 05:02:46,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:46,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:02:46,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749779260] [2020-10-14 05:02:46,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:02:46,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:46,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:02:46,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:02:46,536 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 31 states. [2020-10-14 05:02:47,321 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 73 [2020-10-14 05:02:47,574 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 05:02:47,884 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-14 05:02:48,134 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 05:02:48,491 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-14 05:02:48,774 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-14 05:02:49,235 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 112 [2020-10-14 05:02:50,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:50,701 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2020-10-14 05:02:50,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:02:50,701 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 73 [2020-10-14 05:02:50,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:50,702 INFO L225 Difference]: With dead ends: 117 [2020-10-14 05:02:50,702 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 05:02:50,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=154, Invalid=2198, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 05:02:50,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 05:02:50,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2020-10-14 05:02:50,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-14 05:02:50,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-14 05:02:50,724 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2020-10-14 05:02:50,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:50,725 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-14 05:02:50,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:02:50,725 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-14 05:02:50,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 05:02:50,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:50,727 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:02:50,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:02:50,727 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:50,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:50,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1867551325, now seen corresponding path program 35 times [2020-10-14 05:02:50,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:50,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222210138] [2020-10-14 05:02:50,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:51,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:53,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:53,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 05:02:53,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:53,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2236 [2020-10-14 05:02:53,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:53,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:53,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 05:02:53,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:02:53,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 05:02:53,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:53,804 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-14 05:02:54,123 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-14 05:02:54,385 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-10-14 05:02:54,594 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-10-14 05:02:54,885 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2020-10-14 05:02:55,093 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-10-14 05:02:55,531 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 93 [2020-10-14 05:02:55,776 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2020-10-14 05:02:56,116 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 100 [2020-10-14 05:02:56,390 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-10-14 05:02:56,687 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-10-14 05:02:57,003 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2020-10-14 05:02:58,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:58,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:58,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:58,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:58,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:58,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:02:58,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:58,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:58,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:58,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:58,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:58,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:02:58,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222210138] [2020-10-14 05:02:58,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:58,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 05:02:58,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373412546] [2020-10-14 05:02:58,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 05:02:58,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:58,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 05:02:58,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:02:58,340 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 33 states. [2020-10-14 05:02:59,734 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 79 [2020-10-14 05:02:59,978 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 05:03:00,325 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-10-14 05:03:00,603 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 05:03:01,012 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2020-10-14 05:03:01,306 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-14 05:03:01,842 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 121 [2020-10-14 05:03:02,163 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-10-14 05:03:02,713 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 123 [2020-10-14 05:03:04,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:04,493 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-14 05:03:04,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 05:03:04,494 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-14 05:03:04,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:04,495 INFO L225 Difference]: With dead ends: 108 [2020-10-14 05:03:04,495 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 05:03:04,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=223, Invalid=3083, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 05:03:04,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 05:03:04,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2020-10-14 05:03:04,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 05:03:04,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-14 05:03:04,517 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 74 [2020-10-14 05:03:04,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:04,518 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-14 05:03:04,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 05:03:04,518 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-14 05:03:04,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 05:03:04,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:04,519 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:04,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 05:03:04,519 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:04,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:04,519 INFO L82 PathProgramCache]: Analyzing trace with hash -213944680, now seen corresponding path program 36 times [2020-10-14 05:03:04,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:04,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55114248] [2020-10-14 05:03:04,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:04,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:06,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:06,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 05:03:06,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:06,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2053 [2020-10-14 05:03:06,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:06,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:06,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 05:03:06,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:06,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-14 05:03:06,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:07,612 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-14 05:03:07,875 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-14 05:03:08,027 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-14 05:03:08,297 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-14 05:03:08,693 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2020-10-14 05:03:09,042 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-14 05:03:09,212 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-14 05:03:09,596 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 111 [2020-10-14 05:03:09,837 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2020-10-14 05:03:10,081 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-14 05:03:10,268 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-14 05:03:11,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:11,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:11,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:11,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:11,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:11,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:03:11,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:11,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:11,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:11,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:11,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:11,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:11,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55114248] [2020-10-14 05:03:11,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:11,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 05:03:11,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351291159] [2020-10-14 05:03:11,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 05:03:11,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:11,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 05:03:11,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:03:11,585 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 34 states. [2020-10-14 05:03:12,370 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-10-14 05:03:12,808 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-14 05:03:13,298 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-14 05:03:13,525 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 05:03:13,887 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2020-10-14 05:03:14,143 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 05:03:14,490 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-10-14 05:03:14,794 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-14 05:03:15,236 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-10-14 05:03:15,541 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-14 05:03:16,142 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 134 [2020-10-14 05:03:16,720 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 130 [2020-10-14 05:03:17,430 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 144 [2020-10-14 05:03:18,181 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 117 [2020-10-14 05:03:18,998 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 129 [2020-10-14 05:03:20,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:20,027 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2020-10-14 05:03:20,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 05:03:20,027 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2020-10-14 05:03:20,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:20,029 INFO L225 Difference]: With dead ends: 111 [2020-10-14 05:03:20,029 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 05:03:20,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=257, Invalid=3525, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 05:03:20,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 05:03:20,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 83. [2020-10-14 05:03:20,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 05:03:20,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-14 05:03:20,046 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 75 [2020-10-14 05:03:20,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:20,046 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-14 05:03:20,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 05:03:20,046 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-14 05:03:20,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 05:03:20,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:20,047 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:20,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 05:03:20,047 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:20,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:20,048 INFO L82 PathProgramCache]: Analyzing trace with hash 789691295, now seen corresponding path program 37 times [2020-10-14 05:03:20,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:20,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376936653] [2020-10-14 05:03:20,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:20,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:22,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:22,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 05:03:22,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:22,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2426 [2020-10-14 05:03:22,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:22,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:22,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 05:03:22,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:22,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 05:03:22,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:23,402 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-14 05:03:23,801 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2020-10-14 05:03:23,960 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-14 05:03:24,192 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2020-10-14 05:03:24,377 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-14 05:03:24,683 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2020-10-14 05:03:24,907 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-10-14 05:03:25,254 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 102 [2020-10-14 05:03:25,521 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2020-10-14 05:03:25,782 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-14 05:03:26,032 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-10-14 05:03:27,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:27,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:27,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:27,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:27,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:27,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:03:27,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:27,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:27,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:27,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:27,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:27,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:27,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376936653] [2020-10-14 05:03:27,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:27,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 05:03:27,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028853100] [2020-10-14 05:03:27,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 05:03:27,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:27,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 05:03:27,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1039, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:03:27,475 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 34 states. [2020-10-14 05:03:29,095 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 90 [2020-10-14 05:03:29,360 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 05:03:29,760 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-10-14 05:03:30,065 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-14 05:03:30,503 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-10-14 05:03:30,840 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-10-14 05:03:31,408 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 126 [2020-10-14 05:03:33,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:33,280 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-10-14 05:03:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 05:03:33,281 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 77 [2020-10-14 05:03:33,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:33,282 INFO L225 Difference]: With dead ends: 114 [2020-10-14 05:03:33,282 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 05:03:33,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=219, Invalid=3203, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 05:03:33,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 05:03:33,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 86. [2020-10-14 05:03:33,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-14 05:03:33,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-14 05:03:33,303 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 77 [2020-10-14 05:03:33,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:33,303 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-14 05:03:33,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 05:03:33,303 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-14 05:03:33,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 05:03:33,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:33,304 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:33,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 05:03:33,304 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:33,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:33,305 INFO L82 PathProgramCache]: Analyzing trace with hash 110367370, now seen corresponding path program 38 times [2020-10-14 05:03:33,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:33,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076318276] [2020-10-14 05:03:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:33,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:37,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:37,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 05:03:37,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:37,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3716 [2020-10-14 05:03:37,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:37,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:37,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 05:03:37,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:37,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 05:03:37,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:37,980 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-10-14 05:03:38,265 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-14 05:03:38,634 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-10-14 05:03:38,816 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-14 05:03:39,129 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2020-10-14 05:03:39,392 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2020-10-14 05:03:39,827 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 88 [2020-10-14 05:03:40,165 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2020-10-14 05:03:40,691 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 98 [2020-10-14 05:03:41,057 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2020-10-14 05:03:41,905 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 107 [2020-10-14 05:03:42,267 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 99 [2020-10-14 05:03:42,596 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2020-10-14 05:03:42,886 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 77 [2020-10-14 05:03:44,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:44,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:44,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:44,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:44,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:44,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:03:44,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:44,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:44,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:44,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:44,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:44,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:44,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076318276] [2020-10-14 05:03:44,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:44,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 05:03:44,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515794937] [2020-10-14 05:03:44,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 05:03:44,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:44,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 05:03:44,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1095, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:03:44,389 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 35 states. [2020-10-14 05:03:45,181 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-14 05:03:45,539 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-14 05:03:45,944 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-14 05:03:46,417 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-14 05:03:46,950 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-14 05:03:47,544 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2020-10-14 05:03:48,226 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 114 [2020-10-14 05:03:48,608 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2020-10-14 05:03:49,231 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 140 [2020-10-14 05:03:49,733 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-14 05:03:50,249 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-14 05:03:51,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:51,619 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2020-10-14 05:03:51,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 05:03:51,620 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-14 05:03:51,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:51,621 INFO L225 Difference]: With dead ends: 143 [2020-10-14 05:03:51,621 INFO L226 Difference]: Without dead ends: 141 [2020-10-14 05:03:51,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=227, Invalid=3079, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 05:03:51,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-14 05:03:51,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 91. [2020-10-14 05:03:51,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 05:03:51,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-10-14 05:03:51,644 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 78 [2020-10-14 05:03:51,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:51,644 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-10-14 05:03:51,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 05:03:51,644 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-10-14 05:03:51,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 05:03:51,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:51,645 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:51,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 05:03:51,645 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:51,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:51,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2132616157, now seen corresponding path program 39 times [2020-10-14 05:03:51,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:51,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956545057] [2020-10-14 05:03:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:51,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking...