/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-properties/alternating_list-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:24:11,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:24:11,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:24:11,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:24:11,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:24:11,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:24:11,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:24:11,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:24:11,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:24:11,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:24:11,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:24:11,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:24:11,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:24:11,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:24:11,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:24:11,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:24:11,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:24:11,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:24:11,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:24:11,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:24:11,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:24:11,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:24:11,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:24:11,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:24:11,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:24:11,267 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:24:11,267 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:24:11,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:24:11,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:24:11,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:24:11,271 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:24:11,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:24:11,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:24:11,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:24:11,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:24:11,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:24:11,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:24:11,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:24:11,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:24:11,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:24:11,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:24:11,279 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 09:24:11,321 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:24:11,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:24:11,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:24:11,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:24:11,328 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:24:11,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:24:11,329 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:24:11,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:24:11,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:24:11,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:24:11,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:24:11,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:24:11,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:24:11,330 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:24:11,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:24:11,331 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:24:11,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:24:11,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:24:11,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:24:11,331 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:24:11,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:24:11,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:24:11,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:24:11,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:24:11,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:24:11,333 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:24:11,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:24:11,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:24:11,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:24:11,333 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:24:11,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:24:11,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:24:11,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:24:11,743 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:24:11,744 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:24:11,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list-1.i [2020-10-29 09:24:11,835 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f1107f006/2fa54b0e826c4b38984f8db978763821/FLAGe98043f03 [2020-10-29 09:24:12,550 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:24:12,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/alternating_list-1.i [2020-10-29 09:24:12,576 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f1107f006/2fa54b0e826c4b38984f8db978763821/FLAGe98043f03 [2020-10-29 09:24:12,754 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f1107f006/2fa54b0e826c4b38984f8db978763821 [2020-10-29 09:24:12,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:24:12,764 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:24:12,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:24:12,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:24:12,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:24:12,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:24:12" (1/1) ... [2020-10-29 09:24:12,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a14dd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:12, skipping insertion in model container [2020-10-29 09:24:12,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:24:12" (1/1) ... [2020-10-29 09:24:12,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:24:12,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:24:13,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:24:13,200 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:24:13,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:24:13,359 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:24:13,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:13 WrapperNode [2020-10-29 09:24:13,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:24:13,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:24:13,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:24:13,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:24:13,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:13" (1/1) ... [2020-10-29 09:24:13,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:13" (1/1) ... [2020-10-29 09:24:13,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:13" (1/1) ... [2020-10-29 09:24:13,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:13" (1/1) ... [2020-10-29 09:24:13,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:13" (1/1) ... [2020-10-29 09:24:13,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:13" (1/1) ... [2020-10-29 09:24:13,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:13" (1/1) ... [2020-10-29 09:24:13,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:24:13,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:24:13,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:24:13,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:24:13,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:24:13,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:24:13,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:24:13,510 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:24:13,510 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-29 09:24:13,510 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-29 09:24:13,510 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-29 09:24:13,510 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-29 09:24:13,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-29 09:24:13,511 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-29 09:24:13,511 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:24:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:24:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:24:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:24:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:24:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:24:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:24:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:24:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:24:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:24:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:24:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:24:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:24:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:24:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:24:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:24:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:24:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:24:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:24:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:24:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:24:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:24:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:24:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:24:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-29 09:24:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-29 09:24:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-29 09:24:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-29 09:24:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-29 09:24:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:24:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:24:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:24:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:24:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:24:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:24:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:24:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:24:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:24:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:24:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:24:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:24:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:24:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:24:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:24:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:24:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:24:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:24:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:24:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:24:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:24:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:24:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:24:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:24:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:24:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:24:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:24:13,520 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:24:13,520 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:24:13,520 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:24:13,520 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:24:13,520 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:24:13,520 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:24:13,521 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:24:13,521 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:24:13,521 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:24:13,521 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:24:13,521 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:24:13,521 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:24:13,522 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:24:13,522 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:24:13,522 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:24:13,522 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:24:13,522 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:24:13,522 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:24:13,522 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:24:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:24:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:24:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:24:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:24:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:24:13,523 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:24:13,524 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:24:13,524 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:24:13,524 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:24:13,524 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:24:13,524 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:24:13,524 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:24:13,524 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:24:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:24:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:24:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:24:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:24:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:24:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:24:13,525 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:24:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:24:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:24:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:24:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:24:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:24:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:24:13,526 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:24:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:24:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:24:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:24:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:24:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:24:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:24:13,527 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:24:13,528 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:24:13,528 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:24:13,528 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:24:13,528 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:24:13,528 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:24:13,528 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-29 09:24:13,528 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:24:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:24:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:24:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:24:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:24:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:24:13,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:24:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:24:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:24:13,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:24:13,915 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-29 09:24:14,090 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:24:14,090 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-29 09:24:14,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:24:14 BoogieIcfgContainer [2020-10-29 09:24:14,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:24:14,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:24:14,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:24:14,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:24:14,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:24:12" (1/3) ... [2020-10-29 09:24:14,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afb61ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:24:14, skipping insertion in model container [2020-10-29 09:24:14,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:24:13" (2/3) ... [2020-10-29 09:24:14,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afb61ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:24:14, skipping insertion in model container [2020-10-29 09:24:14,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:24:14" (3/3) ... [2020-10-29 09:24:14,115 INFO L111 eAbstractionObserver]: Analyzing ICFG alternating_list-1.i [2020-10-29 09:24:14,132 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:24:14,138 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:24:14,194 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:24:14,236 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:24:14,236 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:24:14,236 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:24:14,236 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:24:14,237 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:24:14,237 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:24:14,237 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:24:14,237 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:24:14,262 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-29 09:24:14,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:24:14,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:14,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:14,274 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:14,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:14,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1515441424, now seen corresponding path program 1 times [2020-10-29 09:24:14,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:14,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112281960] [2020-10-29 09:24:14,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:14,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:14,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:14,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:14,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:24:14,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:24:14,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 399 [2020-10-29 09:24:14,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:14,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:14,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:24:14,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:24:14,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:24:14,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:24:14,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:14,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:15,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:15,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:15,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:15,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:24:15,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:15,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:15,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:15,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:15,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:15,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:15,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112281960] [2020-10-29 09:24:15,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:24:15,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:24:15,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295040100] [2020-10-29 09:24:15,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:24:15,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:15,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:24:15,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:24:15,047 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 6 states. [2020-10-29 09:24:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:15,300 INFO L93 Difference]: Finished difference Result 88 states and 124 transitions. [2020-10-29 09:24:15,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:24:15,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-29 09:24:15,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:15,311 INFO L225 Difference]: With dead ends: 88 [2020-10-29 09:24:15,311 INFO L226 Difference]: Without dead ends: 38 [2020-10-29 09:24:15,315 INFO L677 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 [2020-10-29 09:24:15,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-29 09:24:15,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2020-10-29 09:24:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 09:24:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-29 09:24:15,360 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2020-10-29 09:24:15,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:15,360 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-29 09:24:15,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:24:15,361 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-29 09:24:15,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:24:15,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:15,362 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:15,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:24:15,362 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:15,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1629498335, now seen corresponding path program 1 times [2020-10-29 09:24:15,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:15,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164215644] [2020-10-29 09:24:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:15,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:15,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:16,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:16,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:24:16,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:24:16,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 731 [2020-10-29 09:24:16,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:16,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:16,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:24:16,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:24:16,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:24:16,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:16,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:16,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:16,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:16,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:16,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:16,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:24:16,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:16,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:16,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:16,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164215644] [2020-10-29 09:24:16,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:16,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:24:16,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320631846] [2020-10-29 09:24:16,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:24:16,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:16,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:24:16,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:24:16,289 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 10 states. [2020-10-29 09:24:16,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:16,546 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2020-10-29 09:24:16,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:24:16,546 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-29 09:24:16,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:16,549 INFO L225 Difference]: With dead ends: 69 [2020-10-29 09:24:16,549 INFO L226 Difference]: Without dead ends: 65 [2020-10-29 09:24:16,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:24:16,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-29 09:24:16,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2020-10-29 09:24:16,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 09:24:16,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-29 09:24:16,560 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 24 [2020-10-29 09:24:16,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:16,561 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-29 09:24:16,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:24:16,561 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-29 09:24:16,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:24:16,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:16,562 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:16,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:24:16,563 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:16,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:16,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1622825151, now seen corresponding path program 1 times [2020-10-29 09:24:16,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:16,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304540674] [2020-10-29 09:24:16,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:16,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:16,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:16,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:24:16,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:16,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-29 09:24:16,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:16,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:16,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:24:16,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:24:16,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:24:16,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:16,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:16,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:16,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:16,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:16,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:16,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:24:16,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:16,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:16,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:16,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:16,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:16,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 09:24:16,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304540674] [2020-10-29 09:24:16,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:24:16,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:24:16,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108712897] [2020-10-29 09:24:16,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:24:16,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:16,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:24:16,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:24:16,745 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 4 states. [2020-10-29 09:24:16,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:16,839 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2020-10-29 09:24:16,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:24:16,839 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-29 09:24:16,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:16,843 INFO L225 Difference]: With dead ends: 67 [2020-10-29 09:24:16,843 INFO L226 Difference]: Without dead ends: 50 [2020-10-29 09:24:16,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:24:16,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-29 09:24:16,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-29 09:24:16,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:24:16,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-29 09:24:16,852 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 24 [2020-10-29 09:24:16,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:16,853 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-29 09:24:16,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:24:16,853 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-29 09:24:16,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:24:16,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:16,854 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:16,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:24:16,854 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:16,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:16,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1811754003, now seen corresponding path program 1 times [2020-10-29 09:24:16,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:16,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784967510] [2020-10-29 09:24:16,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:16,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:16,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:17,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:17,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:24:17,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:24:17,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-29 09:24:17,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:17,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:24:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:24:17,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:17,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:17,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:17,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:17,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:17,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:17,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:24:17,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:17,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:17,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:17,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:17,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:17,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:17,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784967510] [2020-10-29 09:24:17,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:17,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:24:17,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66346005] [2020-10-29 09:24:17,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:24:17,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:17,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:24:17,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:24:17,525 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 10 states. [2020-10-29 09:24:17,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:17,906 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-10-29 09:24:17,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:24:17,906 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-29 09:24:17,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:17,907 INFO L225 Difference]: With dead ends: 78 [2020-10-29 09:24:17,908 INFO L226 Difference]: Without dead ends: 56 [2020-10-29 09:24:17,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:24:17,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-29 09:24:17,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2020-10-29 09:24:17,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 09:24:17,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-29 09:24:17,916 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 29 [2020-10-29 09:24:17,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:17,916 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-29 09:24:17,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:24:17,917 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-29 09:24:17,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:24:17,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:17,918 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:17,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:24:17,918 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:17,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:17,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2120443020, now seen corresponding path program 2 times [2020-10-29 09:24:17,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:17,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345111934] [2020-10-29 09:24:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:17,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:18,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:18,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:24:18,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:18,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-29 09:24:18,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:18,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:18,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:24:18,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:24:18,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:24:18,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:18,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:18,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:18,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:18,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:18,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:18,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:24:18,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:18,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:18,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:18,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:18,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:18,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:18,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345111934] [2020-10-29 09:24:18,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:24:18,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:24:18,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725587258] [2020-10-29 09:24:18,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:24:18,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:18,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:24:18,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:24:18,063 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 4 states. [2020-10-29 09:24:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:18,153 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-10-29 09:24:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:24:18,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-29 09:24:18,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:18,154 INFO L225 Difference]: With dead ends: 72 [2020-10-29 09:24:18,155 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:24:18,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:24:18,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:24:18,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-10-29 09:24:18,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 09:24:18,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-29 09:24:18,162 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 30 [2020-10-29 09:24:18,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:18,162 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-29 09:24:18,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:24:18,162 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-29 09:24:18,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:24:18,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:18,163 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:18,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:24:18,164 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:18,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:18,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1109325770, now seen corresponding path program 1 times [2020-10-29 09:24:18,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:18,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32519731] [2020-10-29 09:24:18,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:18,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:18,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:19,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:19,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:24:19,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:24:19,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 811 [2020-10-29 09:24:19,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:19,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:19,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:24:19,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:19,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:24:19,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:24:19,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:19,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:19,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:19,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:19,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:19,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:24:19,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:19,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:19,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:19,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:19,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:19,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:19,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32519731] [2020-10-29 09:24:19,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:19,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:24:19,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576903279] [2020-10-29 09:24:19,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:24:19,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:19,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:24:19,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:24:19,283 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 12 states. [2020-10-29 09:24:19,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:19,560 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-10-29 09:24:19,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:24:19,561 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-29 09:24:19,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:19,562 INFO L225 Difference]: With dead ends: 53 [2020-10-29 09:24:19,562 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:24:19,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:24:19,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:24:19,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-29 09:24:19,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:24:19,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-10-29 09:24:19,574 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 30 [2020-10-29 09:24:19,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:19,574 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-10-29 09:24:19,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:24:19,574 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-10-29 09:24:19,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:24:19,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:19,578 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:19,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:24:19,578 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:19,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:19,579 INFO L82 PathProgramCache]: Analyzing trace with hash -763052758, now seen corresponding path program 1 times [2020-10-29 09:24:19,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:19,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050345043] [2020-10-29 09:24:19,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:19,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:19,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:19,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:24:19,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:19,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-29 09:24:19,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:19,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:19,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:24:19,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:19,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:24:19,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:20,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:20,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:20,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:20,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:20,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:20,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:24:20,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:20,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:20,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:20,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:20,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:20,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:20,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050345043] [2020-10-29 09:24:20,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:20,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:24:20,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838118089] [2020-10-29 09:24:20,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:24:20,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:20,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:24:20,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:24:20,228 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 13 states. [2020-10-29 09:24:20,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:20,617 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-10-29 09:24:20,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:24:20,618 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-29 09:24:20,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:20,619 INFO L225 Difference]: With dead ends: 73 [2020-10-29 09:24:20,619 INFO L226 Difference]: Without dead ends: 69 [2020-10-29 09:24:20,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:24:20,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-29 09:24:20,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2020-10-29 09:24:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-29 09:24:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-29 09:24:20,628 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 35 [2020-10-29 09:24:20,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:20,628 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-29 09:24:20,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:24:20,629 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-29 09:24:20,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:24:20,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:20,630 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:20,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:24:20,630 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:20,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:20,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2023915350, now seen corresponding path program 1 times [2020-10-29 09:24:20,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:20,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767085055] [2020-10-29 09:24:20,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:20,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:21,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:21,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:24:21,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:21,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-29 09:24:21,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:21,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:21,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:24:21,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:21,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:24:21,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:21,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:21,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:21,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:21,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:21,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:21,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:24:21,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:21,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:21,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:21,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:21,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:21,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:21,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767085055] [2020-10-29 09:24:21,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:21,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:24:21,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998540766] [2020-10-29 09:24:21,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:24:21,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:21,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:24:21,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:24:21,500 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 13 states. [2020-10-29 09:24:22,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:22,157 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2020-10-29 09:24:22,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:24:22,157 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-29 09:24:22,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:22,158 INFO L225 Difference]: With dead ends: 85 [2020-10-29 09:24:22,158 INFO L226 Difference]: Without dead ends: 58 [2020-10-29 09:24:22,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:24:22,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-29 09:24:22,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-10-29 09:24:22,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 09:24:22,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-10-29 09:24:22,166 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 40 [2020-10-29 09:24:22,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:22,166 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-10-29 09:24:22,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:24:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-10-29 09:24:22,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:24:22,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:22,168 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:22,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:24:22,168 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:22,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:22,168 INFO L82 PathProgramCache]: Analyzing trace with hash -999087521, now seen corresponding path program 2 times [2020-10-29 09:24:22,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:22,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249966109] [2020-10-29 09:24:22,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:22,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:22,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:22,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:24:22,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:22,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 680 [2020-10-29 09:24:22,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:22,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:22,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:24:22,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:22,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:24:22,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:23,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:23,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:23,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:23,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:23,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:23,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:24:23,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:23,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:23,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:23,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:23,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:23,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:23,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249966109] [2020-10-29 09:24:23,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:23,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:24:23,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641647597] [2020-10-29 09:24:23,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:24:23,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:23,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:24:23,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:24:23,313 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 15 states. [2020-10-29 09:24:24,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:24,063 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-10-29 09:24:24,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:24:24,065 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-29 09:24:24,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:24,066 INFO L225 Difference]: With dead ends: 79 [2020-10-29 09:24:24,066 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 09:24:24,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:24:24,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 09:24:24,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-10-29 09:24:24,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-29 09:24:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-10-29 09:24:24,075 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 41 [2020-10-29 09:24:24,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:24,076 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-10-29 09:24:24,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:24:24,076 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-10-29 09:24:24,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:24:24,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:24,077 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:24,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:24:24,077 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:24,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:24,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1310135445, now seen corresponding path program 2 times [2020-10-29 09:24:24,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:24,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205975732] [2020-10-29 09:24:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:24,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:24,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:24,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:24:24,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:24,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 550 [2020-10-29 09:24:24,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:24,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:24,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:24:24,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:24,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:24:24,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:25,100 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-29 09:24:25,235 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-29 09:24:25,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:25,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:25,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:25,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:25,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:25,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:24:25,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:25,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:25,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:25,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:25,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:25,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:24:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:25,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205975732] [2020-10-29 09:24:25,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:25,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:24:25,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460917005] [2020-10-29 09:24:25,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:24:25,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:25,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:24:25,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:24:25,708 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 17 states. [2020-10-29 09:24:26,747 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-29 09:24:27,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:27,676 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2020-10-29 09:24:27,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:24:27,678 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-10-29 09:24:27,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:27,679 INFO L225 Difference]: With dead ends: 88 [2020-10-29 09:24:27,679 INFO L226 Difference]: Without dead ends: 84 [2020-10-29 09:24:27,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:24:27,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-29 09:24:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 70. [2020-10-29 09:24:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-29 09:24:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-29 09:24:27,702 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 46 [2020-10-29 09:24:27,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:27,703 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-29 09:24:27,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:24:27,703 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-29 09:24:27,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:24:27,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:27,705 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:27,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:24:27,710 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:27,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:27,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1883295574, now seen corresponding path program 3 times [2020-10-29 09:24:27,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:27,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638116500] [2020-10-29 09:24:27,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:27,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:28,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:28,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:24:28,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:28,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 967 [2020-10-29 09:24:28,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:28,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:28,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:24:28,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:28,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:24:28,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:24:29,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:29,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:29,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:29,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:29,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:29,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:29,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:29,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:29,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:29,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:29,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:29,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:29,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638116500] [2020-10-29 09:24:29,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:29,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:24:29,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370162853] [2020-10-29 09:24:29,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:24:29,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:29,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:24:29,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:24:29,366 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 17 states. [2020-10-29 09:24:29,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:29,887 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-10-29 09:24:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:24:29,888 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-10-29 09:24:29,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:29,889 INFO L225 Difference]: With dead ends: 84 [2020-10-29 09:24:29,889 INFO L226 Difference]: Without dead ends: 80 [2020-10-29 09:24:29,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:24:29,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-29 09:24:29,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-29 09:24:29,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-29 09:24:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-10-29 09:24:29,906 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 47 [2020-10-29 09:24:29,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:29,906 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-10-29 09:24:29,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:24:29,906 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-10-29 09:24:29,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:24:29,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:29,911 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:29,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:24:29,911 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:29,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:29,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1549408449, now seen corresponding path program 1 times [2020-10-29 09:24:29,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:29,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023771097] [2020-10-29 09:24:29,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:29,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:30,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:30,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:24:30,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:30,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 725 [2020-10-29 09:24:30,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:30,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:30,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:24:30,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:30,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:24:30,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:24:31,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:31,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:31,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:31,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:31,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:31,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:31,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:31,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:31,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:31,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:31,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:31,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:31,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023771097] [2020-10-29 09:24:31,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:31,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:24:31,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111595755] [2020-10-29 09:24:31,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:24:31,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:31,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:24:31,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:24:31,317 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 16 states. [2020-10-29 09:24:32,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:32,219 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2020-10-29 09:24:32,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:24:32,220 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-29 09:24:32,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:32,221 INFO L225 Difference]: With dead ends: 100 [2020-10-29 09:24:32,221 INFO L226 Difference]: Without dead ends: 68 [2020-10-29 09:24:32,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:24:32,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-29 09:24:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-10-29 09:24:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 09:24:32,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-10-29 09:24:32,235 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 51 [2020-10-29 09:24:32,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:32,236 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-10-29 09:24:32,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:24:32,236 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-10-29 09:24:32,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:24:32,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:32,244 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:32,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:24:32,245 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:32,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:32,245 INFO L82 PathProgramCache]: Analyzing trace with hash 561113598, now seen corresponding path program 3 times [2020-10-29 09:24:32,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:32,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982956224] [2020-10-29 09:24:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:32,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:33,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:33,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:24:33,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:33,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 972 [2020-10-29 09:24:33,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:33,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:33,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:24:33,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:33,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:24:33,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:34,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:34,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:34,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:34,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:34,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:34,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 09:24:34,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:34,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:34,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:34,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:34,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:34,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:34,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982956224] [2020-10-29 09:24:34,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:34,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:24:34,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197366415] [2020-10-29 09:24:34,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:24:34,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:34,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:24:34,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:24:34,110 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 18 states. [2020-10-29 09:24:35,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:35,182 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-10-29 09:24:35,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:24:35,187 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-29 09:24:35,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:35,188 INFO L225 Difference]: With dead ends: 74 [2020-10-29 09:24:35,188 INFO L226 Difference]: Without dead ends: 70 [2020-10-29 09:24:35,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:24:35,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-29 09:24:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-29 09:24:35,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-29 09:24:35,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-10-29 09:24:35,202 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 52 [2020-10-29 09:24:35,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:35,203 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-10-29 09:24:35,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:24:35,203 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-10-29 09:24:35,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 09:24:35,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:35,204 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:35,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:24:35,204 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:35,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:35,205 INFO L82 PathProgramCache]: Analyzing trace with hash 66390902, now seen corresponding path program 2 times [2020-10-29 09:24:35,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:35,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220348878] [2020-10-29 09:24:35,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:35,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:35,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:36,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:36,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 09:24:36,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:36,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-10-29 09:24:36,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:36,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:36,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:24:36,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:36,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 09:24:36,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:37,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:37,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:37,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:37,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:37,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:37,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:37,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:37,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:37,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:37,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:37,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:37,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:37,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220348878] [2020-10-29 09:24:37,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:37,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:24:37,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798300534] [2020-10-29 09:24:37,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:24:37,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:37,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:24:37,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:24:37,519 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 21 states. [2020-10-29 09:24:38,237 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-29 09:24:38,528 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 39 [2020-10-29 09:24:38,720 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2020-10-29 09:24:38,913 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2020-10-29 09:24:39,248 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-10-29 09:24:40,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:40,481 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2020-10-29 09:24:40,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:24:40,481 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2020-10-29 09:24:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:40,483 INFO L225 Difference]: With dead ends: 106 [2020-10-29 09:24:40,483 INFO L226 Difference]: Without dead ends: 102 [2020-10-29 09:24:40,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=226, Invalid=1666, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:24:40,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-29 09:24:40,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2020-10-29 09:24:40,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-29 09:24:40,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-10-29 09:24:40,493 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 57 [2020-10-29 09:24:40,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:40,493 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-10-29 09:24:40,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:24:40,493 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-10-29 09:24:40,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:24:40,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:40,494 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:40,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:24:40,495 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:40,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:40,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1469989342, now seen corresponding path program 4 times [2020-10-29 09:24:40,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:40,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968295990] [2020-10-29 09:24:40,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:40,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:41,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:41,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:24:41,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:41,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1142 [2020-10-29 09:24:41,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:41,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:41,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:24:41,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:41,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 09:24:41,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:42,172 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-29 09:24:42,296 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-29 09:24:42,514 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-29 09:24:43,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:43,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:43,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:43,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:43,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:43,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:43,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:43,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:43,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:43,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:43,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:43,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:43,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968295990] [2020-10-29 09:24:43,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:43,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:24:43,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115492946] [2020-10-29 09:24:43,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:24:43,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:43,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:24:43,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:24:43,193 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 21 states. [2020-10-29 09:24:44,158 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2020-10-29 09:24:44,375 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-29 09:24:44,606 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2020-10-29 09:24:44,941 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-10-29 09:24:45,333 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2020-10-29 09:24:46,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:46,381 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2020-10-29 09:24:46,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:24:46,382 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 62 [2020-10-29 09:24:46,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:46,384 INFO L225 Difference]: With dead ends: 118 [2020-10-29 09:24:46,384 INFO L226 Difference]: Without dead ends: 81 [2020-10-29 09:24:46,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:24:46,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-29 09:24:46,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2020-10-29 09:24:46,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 09:24:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-10-29 09:24:46,394 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 62 [2020-10-29 09:24:46,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:46,394 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-10-29 09:24:46,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:24:46,394 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-10-29 09:24:46,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 09:24:46,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:46,395 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:46,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:24:46,395 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:46,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:46,396 INFO L82 PathProgramCache]: Analyzing trace with hash 405807467, now seen corresponding path program 3 times [2020-10-29 09:24:46,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:46,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140977237] [2020-10-29 09:24:46,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:46,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:48,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:48,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 09:24:48,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:48,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1620 [2020-10-29 09:24:48,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:48,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:48,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:24:48,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:48,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 09:24:48,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:48,397 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-10-29 09:24:48,699 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-29 09:24:48,847 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-10-29 09:24:49,078 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-29 09:24:49,253 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-29 09:24:49,448 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-29 09:24:49,766 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2020-10-29 09:24:49,981 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-29 09:24:50,243 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-29 09:24:50,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:50,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:50,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:50,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:50,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:50,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:50,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:50,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:50,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:50,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:50,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:50,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:50,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140977237] [2020-10-29 09:24:50,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:50,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:24:50,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858811037] [2020-10-29 09:24:50,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:24:50,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:50,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:24:50,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:24:50,718 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 23 states. [2020-10-29 09:24:51,484 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-29 09:24:51,833 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2020-10-29 09:24:52,065 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2020-10-29 09:24:52,289 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2020-10-29 09:24:52,449 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-29 09:24:52,665 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-29 09:24:52,850 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-29 09:24:53,088 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 61 [2020-10-29 09:24:53,409 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 78 [2020-10-29 09:24:53,597 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 44 [2020-10-29 09:24:54,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:24:54,845 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2020-10-29 09:24:54,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:24:54,847 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-10-29 09:24:54,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:24:54,847 INFO L225 Difference]: With dead ends: 112 [2020-10-29 09:24:54,848 INFO L226 Difference]: Without dead ends: 108 [2020-10-29 09:24:54,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=268, Invalid=2084, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:24:54,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-29 09:24:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2020-10-29 09:24:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 09:24:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-10-29 09:24:54,856 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 63 [2020-10-29 09:24:54,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:24:54,856 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-10-29 09:24:54,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:24:54,856 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-10-29 09:24:54,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 09:24:54,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:24:54,857 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:24:54,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:24:54,857 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:24:54,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:24:54,858 INFO L82 PathProgramCache]: Analyzing trace with hash 672898313, now seen corresponding path program 5 times [2020-10-29 09:24:54,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:24:54,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697159251] [2020-10-29 09:24:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:24:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:54,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:56,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:56,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 09:24:56,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:56,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1520 [2020-10-29 09:24:56,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:56,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:56,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:24:56,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:24:56,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 09:24:56,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:57,291 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-29 09:24:57,588 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2020-10-29 09:24:57,805 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-29 09:24:58,107 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-29 09:24:58,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:24:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:24:58,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:24:58,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:24:58,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:24:58,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:24:58,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:24:58,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:24:58,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:24:58,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:24:58,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:24:58,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:24:58,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:24:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:24:58,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697159251] [2020-10-29 09:24:58,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:24:58,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:24:58,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091848521] [2020-10-29 09:24:58,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:24:58,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:24:58,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:24:58,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:24:58,612 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 23 states. [2020-10-29 09:24:59,633 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 61 [2020-10-29 09:24:59,866 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 46 [2020-10-29 09:25:00,093 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-29 09:25:00,393 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2020-10-29 09:25:00,606 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-29 09:25:00,837 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 61 [2020-10-29 09:25:01,179 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 82 [2020-10-29 09:25:01,371 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 48 [2020-10-29 09:25:03,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:03,105 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2020-10-29 09:25:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 09:25:03,106 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 68 [2020-10-29 09:25:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:03,111 INFO L225 Difference]: With dead ends: 117 [2020-10-29 09:25:03,111 INFO L226 Difference]: Without dead ends: 113 [2020-10-29 09:25:03,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=266, Invalid=2086, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:25:03,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-29 09:25:03,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-29 09:25:03,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-29 09:25:03,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-10-29 09:25:03,128 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 68 [2020-10-29 09:25:03,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:03,129 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-10-29 09:25:03,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:25:03,129 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-10-29 09:25:03,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 09:25:03,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:03,129 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:03,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:25:03,130 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:03,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:03,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1442974558, now seen corresponding path program 4 times [2020-10-29 09:25:03,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:03,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926933664] [2020-10-29 09:25:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:03,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:05,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:05,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 09:25:05,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:05,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2009 [2020-10-29 09:25:05,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:05,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:05,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:25:05,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:05,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 09:25:05,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:05,779 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-29 09:25:06,432 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-29 09:25:07,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:07,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:07,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:07,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:07,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:07,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:07,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:07,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:07,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:07,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:07,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:07,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:07,153 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 09:25:07,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926933664] [2020-10-29 09:25:07,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:07,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:25:07,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186595249] [2020-10-29 09:25:07,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:25:07,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:07,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:25:07,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:25:07,156 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 24 states. [2020-10-29 09:25:07,893 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-29 09:25:08,077 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-10-29 09:25:08,255 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2020-10-29 09:25:08,430 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2020-10-29 09:25:08,621 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2020-10-29 09:25:08,952 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-29 09:25:09,143 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-29 09:25:09,373 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-29 09:25:09,699 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-29 09:25:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:10,680 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2020-10-29 09:25:10,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:25:10,680 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-10-29 09:25:10,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:10,682 INFO L225 Difference]: With dead ends: 118 [2020-10-29 09:25:10,682 INFO L226 Difference]: Without dead ends: 114 [2020-10-29 09:25:10,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=235, Invalid=2021, Unknown=0, NotChecked=0, Total=2256 [2020-10-29 09:25:10,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-29 09:25:10,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-10-29 09:25:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-29 09:25:10,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2020-10-29 09:25:10,692 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 69 [2020-10-29 09:25:10,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:10,692 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2020-10-29 09:25:10,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:25:10,692 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2020-10-29 09:25:10,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 09:25:10,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:10,693 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:10,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:25:10,693 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:10,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:10,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1160283979, now seen corresponding path program 5 times [2020-10-29 09:25:10,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:10,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885597155] [2020-10-29 09:25:10,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:10,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:12,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:12,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 09:25:12,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:12,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1641 [2020-10-29 09:25:12,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:12,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:12,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:25:12,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:12,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 09:25:12,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:12,978 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-29 09:25:13,286 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-29 09:25:13,619 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-10-29 09:25:13,851 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-29 09:25:14,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:14,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:14,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:14,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:14,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:14,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:25:14,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:14,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:14,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:14,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:14,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:14,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:14,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885597155] [2020-10-29 09:25:14,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:14,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:25:14,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049740538] [2020-10-29 09:25:14,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:25:14,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:14,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:25:14,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:25:14,673 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 24 states. [2020-10-29 09:25:15,657 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 50 [2020-10-29 09:25:15,869 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 45 [2020-10-29 09:25:16,073 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-29 09:25:16,358 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2020-10-29 09:25:16,643 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-29 09:25:16,881 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 57 [2020-10-29 09:25:17,252 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 78 [2020-10-29 09:25:17,468 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 52 [2020-10-29 09:25:19,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:19,215 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2020-10-29 09:25:19,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 09:25:19,215 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 73 [2020-10-29 09:25:19,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:19,217 INFO L225 Difference]: With dead ends: 134 [2020-10-29 09:25:19,217 INFO L226 Difference]: Without dead ends: 92 [2020-10-29 09:25:19,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=232, Invalid=2218, Unknown=0, NotChecked=0, Total=2450 [2020-10-29 09:25:19,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-29 09:25:19,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2020-10-29 09:25:19,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-29 09:25:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2020-10-29 09:25:19,226 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 73 [2020-10-29 09:25:19,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:19,227 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2020-10-29 09:25:19,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:25:19,227 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2020-10-29 09:25:19,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 09:25:19,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:19,228 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:19,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:25:19,228 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:19,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:19,229 INFO L82 PathProgramCache]: Analyzing trace with hash 450114610, now seen corresponding path program 6 times [2020-10-29 09:25:19,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:19,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199390745] [2020-10-29 09:25:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:19,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:21,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:21,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 09:25:21,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:21,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2135 [2020-10-29 09:25:21,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:21,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:21,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:25:21,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:21,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 09:25:21,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:22,021 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-29 09:25:22,216 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-29 09:25:22,477 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-29 09:25:22,741 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-29 09:25:22,951 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-29 09:25:23,207 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2020-10-29 09:25:23,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:23,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:23,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:23,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:23,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:23,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:23,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:23,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:23,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:23,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:23,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:23,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:23,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199390745] [2020-10-29 09:25:23,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:23,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:25:23,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967412267] [2020-10-29 09:25:23,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:25:23,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:23,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:25:23,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:25:23,996 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 25 states. [2020-10-29 09:25:25,034 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 54 [2020-10-29 09:25:25,240 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 45 [2020-10-29 09:25:25,446 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-29 09:25:25,682 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-29 09:25:25,906 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-29 09:25:26,183 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 63 [2020-10-29 09:25:26,463 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 69 [2020-10-29 09:25:26,808 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 84 [2020-10-29 09:25:27,078 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-10-29 09:25:27,553 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 87 [2020-10-29 09:25:28,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:28,972 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2020-10-29 09:25:28,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 09:25:28,972 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 74 [2020-10-29 09:25:28,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:28,974 INFO L225 Difference]: With dead ends: 98 [2020-10-29 09:25:28,974 INFO L226 Difference]: Without dead ends: 94 [2020-10-29 09:25:28,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=302, Invalid=2248, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:25:28,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-29 09:25:28,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-10-29 09:25:28,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-29 09:25:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-10-29 09:25:28,983 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 74 [2020-10-29 09:25:28,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:28,984 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-10-29 09:25:28,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:25:28,984 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-10-29 09:25:28,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 09:25:28,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:28,984 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:28,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:25:28,985 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:28,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:28,985 INFO L82 PathProgramCache]: Analyzing trace with hash 925696450, now seen corresponding path program 6 times [2020-10-29 09:25:28,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:28,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323033396] [2020-10-29 09:25:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:29,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:30,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:30,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 09:25:30,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:30,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1906 [2020-10-29 09:25:30,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:30,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:30,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 09:25:30,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:30,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 09:25:30,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:31,506 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-29 09:25:31,741 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-29 09:25:32,008 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-29 09:25:32,402 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-10-29 09:25:32,637 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-29 09:25:32,787 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-29 09:25:32,991 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-10-29 09:25:34,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:34,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:34,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:34,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:34,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:34,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:34,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:34,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:34,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:34,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:34,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:34,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:34,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323033396] [2020-10-29 09:25:34,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:34,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:25:34,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453801966] [2020-10-29 09:25:34,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:25:34,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:34,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:25:34,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:25:34,166 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 27 states. [2020-10-29 09:25:34,619 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 24 [2020-10-29 09:25:35,387 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 38 [2020-10-29 09:25:35,705 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 56 [2020-10-29 09:25:35,982 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 47 [2020-10-29 09:25:36,228 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-29 09:25:36,568 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2020-10-29 09:25:36,849 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-29 09:25:37,167 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 60 [2020-10-29 09:25:37,566 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 70 [2020-10-29 09:25:37,933 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 69 [2020-10-29 09:25:38,167 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-29 09:25:38,547 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 97 [2020-10-29 09:25:39,114 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 58 [2020-10-29 09:25:39,418 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 50 [2020-10-29 09:25:39,831 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 42 [2020-10-29 09:25:40,392 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 38 [2020-10-29 09:25:41,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:41,372 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2020-10-29 09:25:41,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-29 09:25:41,373 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2020-10-29 09:25:41,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:41,374 INFO L225 Difference]: With dead ends: 138 [2020-10-29 09:25:41,374 INFO L226 Difference]: Without dead ends: 134 [2020-10-29 09:25:41,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=315, Invalid=3225, Unknown=0, NotChecked=0, Total=3540 [2020-10-29 09:25:41,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-29 09:25:41,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2020-10-29 09:25:41,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-29 09:25:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2020-10-29 09:25:41,388 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 79 [2020-10-29 09:25:41,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:41,388 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2020-10-29 09:25:41,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:25:41,388 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2020-10-29 09:25:41,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 09:25:41,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:41,389 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:41,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:25:41,390 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:41,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:41,390 INFO L82 PathProgramCache]: Analyzing trace with hash -660579566, now seen corresponding path program 7 times [2020-10-29 09:25:41,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:41,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294453330] [2020-10-29 09:25:41,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:41,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:43,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:43,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 09:25:43,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:43,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2412 [2020-10-29 09:25:43,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:43,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:43,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 09:25:43,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:43,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 09:25:43,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:44,928 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-29 09:25:45,136 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-29 09:25:45,443 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-29 09:25:45,608 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-29 09:25:45,796 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-29 09:25:46,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:46,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:46,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:46,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:46,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:46,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:46,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:46,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:46,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:46,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:46,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:46,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 9 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:46,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294453330] [2020-10-29 09:25:46,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:46,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:25:46,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553760003] [2020-10-29 09:25:46,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:25:46,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:46,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:25:46,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=645, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:25:46,625 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand 27 states. [2020-10-29 09:25:47,795 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2020-10-29 09:25:48,028 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 48 [2020-10-29 09:25:48,224 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-29 09:25:48,540 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 74 [2020-10-29 09:25:48,838 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-29 09:25:49,339 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 101 [2020-10-29 09:25:49,582 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-29 09:25:49,983 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 101 [2020-10-29 09:25:50,457 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-29 09:25:51,046 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2020-10-29 09:25:51,499 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-29 09:25:51,715 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-10-29 09:25:52,194 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-29 09:25:52,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:25:52,617 INFO L93 Difference]: Finished difference Result 153 states and 159 transitions. [2020-10-29 09:25:52,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 09:25:52,621 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 84 [2020-10-29 09:25:52,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:25:52,622 INFO L225 Difference]: With dead ends: 153 [2020-10-29 09:25:52,622 INFO L226 Difference]: Without dead ends: 106 [2020-10-29 09:25:52,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=229, Invalid=2851, Unknown=0, NotChecked=0, Total=3080 [2020-10-29 09:25:52,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-29 09:25:52,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2020-10-29 09:25:52,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 09:25:52,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-10-29 09:25:52,634 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 84 [2020-10-29 09:25:52,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:25:52,634 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-10-29 09:25:52,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:25:52,634 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-10-29 09:25:52,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 09:25:52,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:25:52,635 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:25:52,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:25:52,636 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:25:52,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:25:52,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1399953527, now seen corresponding path program 7 times [2020-10-29 09:25:52,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:25:52,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097895605] [2020-10-29 09:25:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:25:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:52,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:55,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:55,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 09:25:55,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:55,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2284 [2020-10-29 09:25:55,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:55,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:55,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 09:25:55,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:25:55,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 09:25:55,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:55,752 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-29 09:25:55,908 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-29 09:25:56,236 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-29 09:25:56,361 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-29 09:25:56,622 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-10-29 09:25:56,791 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-29 09:25:57,050 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2020-10-29 09:25:57,603 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2020-10-29 09:25:58,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:25:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:25:58,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:25:58,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:25:58,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:25:58,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:25:58,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:25:58,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:25:58,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:25:58,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:25:58,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:25:58,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:25:58,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:25:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:25:58,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097895605] [2020-10-29 09:25:58,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:25:58,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 09:25:58,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689992135] [2020-10-29 09:25:58,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 09:25:58,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:25:58,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 09:25:58,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:25:58,695 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 29 states. [2020-10-29 09:25:59,425 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-29 09:25:59,998 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-29 09:26:00,210 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-29 09:26:00,473 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-29 09:26:00,708 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-29 09:26:00,977 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-29 09:26:01,343 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-29 09:26:01,772 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 99 [2020-10-29 09:26:02,420 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 102 [2020-10-29 09:26:03,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:03,346 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-10-29 09:26:03,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:26:03,347 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2020-10-29 09:26:03,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:03,349 INFO L225 Difference]: With dead ends: 107 [2020-10-29 09:26:03,349 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 09:26:03,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=201, Invalid=2249, Unknown=0, NotChecked=0, Total=2450 [2020-10-29 09:26:03,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 09:26:03,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-29 09:26:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-29 09:26:03,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2020-10-29 09:26:03,361 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 85 [2020-10-29 09:26:03,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:03,361 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2020-10-29 09:26:03,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 09:26:03,362 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2020-10-29 09:26:03,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-29 09:26:03,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:03,363 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:03,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:26:03,363 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:03,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:03,364 INFO L82 PathProgramCache]: Analyzing trace with hash -223957635, now seen corresponding path program 8 times [2020-10-29 09:26:03,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:03,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943317290] [2020-10-29 09:26:03,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:03,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:05,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:05,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-29 09:26:05,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:05,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2475 [2020-10-29 09:26:05,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:05,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:05,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 09:26:05,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:05,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 09:26:05,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:06,519 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-29 09:26:06,722 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-29 09:26:07,050 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-29 09:26:07,208 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-29 09:26:07,502 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-29 09:26:07,752 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2020-10-29 09:26:08,045 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-10-29 09:26:08,568 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 78 [2020-10-29 09:26:08,928 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2020-10-29 09:26:09,195 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-29 09:26:09,561 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 63 [2020-10-29 09:26:10,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:10,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:10,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:10,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:10,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:10,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:10,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:10,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:10,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:10,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:10,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:10,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:10,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943317290] [2020-10-29 09:26:10,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:10,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 09:26:10,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080382112] [2020-10-29 09:26:10,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 09:26:10,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:10,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 09:26:10,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:26:10,455 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand 29 states. [2020-10-29 09:26:11,434 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 41 [2020-10-29 09:26:11,707 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 55 [2020-10-29 09:26:11,980 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 46 [2020-10-29 09:26:12,434 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 59 [2020-10-29 09:26:12,850 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 73 [2020-10-29 09:26:13,237 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 65 [2020-10-29 09:26:13,621 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-29 09:26:14,140 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 95 [2020-10-29 09:26:14,480 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2020-10-29 09:26:14,898 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 83 [2020-10-29 09:26:15,618 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 121 [2020-10-29 09:26:15,992 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 67 [2020-10-29 09:26:16,562 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 54 [2020-10-29 09:26:19,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:19,030 INFO L93 Difference]: Finished difference Result 154 states and 158 transitions. [2020-10-29 09:26:19,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-29 09:26:19,031 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 90 [2020-10-29 09:26:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:19,033 INFO L225 Difference]: With dead ends: 154 [2020-10-29 09:26:19,033 INFO L226 Difference]: Without dead ends: 150 [2020-10-29 09:26:19,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=367, Invalid=3415, Unknown=0, NotChecked=0, Total=3782 [2020-10-29 09:26:19,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-29 09:26:19,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2020-10-29 09:26:19,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-29 09:26:19,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2020-10-29 09:26:19,049 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 90 [2020-10-29 09:26:19,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:19,050 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2020-10-29 09:26:19,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 09:26:19,050 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2020-10-29 09:26:19,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 09:26:19,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:19,051 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:19,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:26:19,051 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:19,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:19,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1828298583, now seen corresponding path program 8 times [2020-10-29 09:26:19,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:19,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776281854] [2020-10-29 09:26:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:19,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:21,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:21,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 09:26:21,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:21,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2763 [2020-10-29 09:26:21,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:21,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:21,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-29 09:26:21,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-29 09:26:21,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:22,471 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2020-10-29 09:26:22,697 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-10-29 09:26:22,920 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-29 09:26:23,137 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-29 09:26:23,413 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-29 09:26:23,605 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-29 09:26:23,987 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 70 [2020-10-29 09:26:24,578 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 84 [2020-10-29 09:26:25,088 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 78 [2020-10-29 09:26:25,563 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-10-29 09:26:26,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:26,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:26,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:26,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:26,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:26,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:26:26,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:26,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:26,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:26,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:26,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:26,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 10 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:26,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776281854] [2020-10-29 09:26:26,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:26,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 09:26:26,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707699138] [2020-10-29 09:26:26,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 09:26:26,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:26,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 09:26:26,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=805, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:26:26,733 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand 30 states. [2020-10-29 09:26:27,121 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 17 [2020-10-29 09:26:27,366 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 24 [2020-10-29 09:26:27,667 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 29 [2020-10-29 09:26:28,137 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 38 [2020-10-29 09:26:28,536 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 55 [2020-10-29 09:26:28,886 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 47 [2020-10-29 09:26:29,338 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2020-10-29 09:26:29,919 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 56 [2020-10-29 09:26:30,432 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 88 [2020-10-29 09:26:30,857 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 65 [2020-10-29 09:26:31,221 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-29 09:26:31,749 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 108 [2020-10-29 09:26:32,046 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-29 09:26:32,510 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 81 [2020-10-29 09:26:33,203 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 113 [2020-10-29 09:26:33,743 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 69 [2020-10-29 09:26:34,512 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 61 [2020-10-29 09:26:34,879 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 53 [2020-10-29 09:26:35,168 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 12 [2020-10-29 09:26:35,805 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 49 [2020-10-29 09:26:36,099 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 43 [2020-10-29 09:26:36,720 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 37 [2020-10-29 09:26:36,982 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 32 [2020-10-29 09:26:37,515 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 28 [2020-10-29 09:26:37,764 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 19 [2020-10-29 09:26:38,026 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 21 [2020-10-29 09:26:38,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:38,117 INFO L93 Difference]: Finished difference Result 166 states and 171 transitions. [2020-10-29 09:26:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-29 09:26:38,118 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 95 [2020-10-29 09:26:38,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:38,120 INFO L225 Difference]: With dead ends: 166 [2020-10-29 09:26:38,120 INFO L226 Difference]: Without dead ends: 114 [2020-10-29 09:26:38,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=349, Invalid=3941, Unknown=0, NotChecked=0, Total=4290 [2020-10-29 09:26:38,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-29 09:26:38,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2020-10-29 09:26:38,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-29 09:26:38,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2020-10-29 09:26:38,134 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 95 [2020-10-29 09:26:38,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:38,134 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2020-10-29 09:26:38,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 09:26:38,135 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2020-10-29 09:26:38,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-29 09:26:38,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:38,136 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 6, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:38,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:26:38,136 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:38,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:38,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1362826854, now seen corresponding path program 9 times [2020-10-29 09:26:38,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:38,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642735741] [2020-10-29 09:26:38,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:38,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:41,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:41,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-29 09:26:41,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:41,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3000 [2020-10-29 09:26:41,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:41,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-29 09:26:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 09:26:41,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:42,135 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-29 09:26:42,731 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-10-29 09:26:43,318 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 86 [2020-10-29 09:26:43,804 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2020-10-29 09:26:44,072 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-10-29 09:26:44,414 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 90 [2020-10-29 09:26:45,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:26:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:45,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:45,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:45,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:26:45,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:45,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:26:45,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:45,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:45,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:26:45,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:26:45,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:26:45,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:26:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:26:45,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642735741] [2020-10-29 09:26:45,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:26:45,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 09:26:45,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265448347] [2020-10-29 09:26:45,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 09:26:45,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:26:45,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 09:26:45,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=849, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:26:45,845 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand 31 states. [2020-10-29 09:26:46,824 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 40 [2020-10-29 09:26:47,098 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 54 [2020-10-29 09:26:47,357 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 47 [2020-10-29 09:26:47,777 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 58 [2020-10-29 09:26:48,152 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 72 [2020-10-29 09:26:48,471 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 65 [2020-10-29 09:26:48,822 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-10-29 09:26:49,201 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 96 [2020-10-29 09:26:49,550 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-29 09:26:49,984 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 83 [2020-10-29 09:26:50,442 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 91 [2020-10-29 09:26:51,041 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 103 [2020-10-29 09:26:51,527 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 110 [2020-10-29 09:26:52,326 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 115 [2020-10-29 09:26:52,875 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 117 [2020-10-29 09:26:53,105 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 52 [2020-10-29 09:26:55,101 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-29 09:26:55,371 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-29 09:26:55,712 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-29 09:26:55,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:26:55,753 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2020-10-29 09:26:55,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-29 09:26:55,754 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 96 [2020-10-29 09:26:55,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:26:55,755 INFO L225 Difference]: With dead ends: 120 [2020-10-29 09:26:55,755 INFO L226 Difference]: Without dead ends: 116 [2020-10-29 09:26:55,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=376, Invalid=3784, Unknown=0, NotChecked=0, Total=4160 [2020-10-29 09:26:55,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-29 09:26:55,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2020-10-29 09:26:55,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-29 09:26:55,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2020-10-29 09:26:55,768 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 96 [2020-10-29 09:26:55,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:26:55,769 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2020-10-29 09:26:55,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 09:26:55,769 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2020-10-29 09:26:55,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-29 09:26:55,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:26:55,770 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:26:55,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:26:55,770 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:26:55,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:26:55,771 INFO L82 PathProgramCache]: Analyzing trace with hash 276783118, now seen corresponding path program 9 times [2020-10-29 09:26:55,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:26:55,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598057646] [2020-10-29 09:26:55,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:26:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:26:55,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:26:59,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:26:59,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 09:26:59,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:26:59,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3537 [2020-10-29 09:26:59,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:26:59,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:26:59,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 09:26:59,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:26:59,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-29 09:26:59,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:00,036 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-29 09:27:00,210 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-29 09:27:00,351 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-29 09:27:00,562 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-29 09:27:01,002 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-29 09:27:01,217 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-29 09:27:01,354 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-29 09:27:01,604 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-29 09:27:01,811 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-29 09:27:02,148 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2020-10-29 09:27:02,373 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-29 09:27:02,755 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2020-10-29 09:27:03,025 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-10-29 09:27:03,309 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-10-29 09:27:03,666 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 86 [2020-10-29 09:27:04,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:04,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:04,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:04,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:04,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:04,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:27:04,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:04,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:04,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:04,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:04,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:04,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:27:05,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598057646] [2020-10-29 09:27:05,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:05,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-29 09:27:05,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837796659] [2020-10-29 09:27:05,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-29 09:27:05,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:05,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-29 09:27:05,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=976, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:27:05,060 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand 33 states. [2020-10-29 09:27:06,432 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 50 [2020-10-29 09:27:06,701 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 46 [2020-10-29 09:27:06,976 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-29 09:27:07,278 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2020-10-29 09:27:07,565 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-29 09:27:07,867 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 58 [2020-10-29 09:27:08,248 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 73 [2020-10-29 09:27:08,617 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 68 [2020-10-29 09:27:08,863 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-29 09:27:09,223 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-29 09:27:09,545 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-29 09:27:09,922 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 78 [2020-10-29 09:27:10,371 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 88 [2020-10-29 09:27:10,807 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 87 [2020-10-29 09:27:11,118 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-10-29 09:27:11,666 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 123 [2020-10-29 09:27:12,288 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 70 [2020-10-29 09:27:12,569 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 58 [2020-10-29 09:27:15,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:15,142 INFO L93 Difference]: Finished difference Result 170 states and 174 transitions. [2020-10-29 09:27:15,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-29 09:27:15,143 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 101 [2020-10-29 09:27:15,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:15,145 INFO L225 Difference]: With dead ends: 170 [2020-10-29 09:27:15,145 INFO L226 Difference]: Without dead ends: 166 [2020-10-29 09:27:15,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=408, Invalid=5142, Unknown=0, NotChecked=0, Total=5550 [2020-10-29 09:27:15,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-29 09:27:15,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 159. [2020-10-29 09:27:15,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-29 09:27:15,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2020-10-29 09:27:15,164 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 101 [2020-10-29 09:27:15,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:15,164 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2020-10-29 09:27:15,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-29 09:27:15,165 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2020-10-29 09:27:15,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-29 09:27:15,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:15,166 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:15,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:27:15,166 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:15,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:15,167 INFO L82 PathProgramCache]: Analyzing trace with hash -339145658, now seen corresponding path program 10 times [2020-10-29 09:27:15,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:15,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186150816] [2020-10-29 09:27:15,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:15,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:19,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:19,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-29 09:27:19,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:19,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3821 [2020-10-29 09:27:19,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:19,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:19,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-29 09:27:19,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:19,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-29 09:27:19,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:19,831 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-10-29 09:27:20,131 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-29 09:27:20,475 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-29 09:27:20,824 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-29 09:27:21,324 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2020-10-29 09:27:21,676 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-29 09:27:22,105 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92 [2020-10-29 09:27:22,276 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-29 09:27:22,556 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2020-10-29 09:27:22,882 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-29 09:27:23,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:23,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:23,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:23,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:23,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:23,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:27:23,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:23,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:23,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:23,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:23,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:23,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:27:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 12 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:27:24,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186150816] [2020-10-29 09:27:24,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:24,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-29 09:27:24,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94240019] [2020-10-29 09:27:24,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-29 09:27:24,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:24,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-29 09:27:24,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:27:24,127 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand 33 states. [2020-10-29 09:27:24,853 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-29 09:27:25,334 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-29 09:27:25,562 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-29 09:27:25,883 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-29 09:27:26,144 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-29 09:27:26,525 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-29 09:27:26,830 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-29 09:27:27,262 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-29 09:27:27,604 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-29 09:27:28,123 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 107 [2020-10-29 09:27:30,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:27:30,048 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2020-10-29 09:27:30,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 09:27:30,049 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 106 [2020-10-29 09:27:30,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:27:30,051 INFO L225 Difference]: With dead ends: 180 [2020-10-29 09:27:30,051 INFO L226 Difference]: Without dead ends: 123 [2020-10-29 09:27:30,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=187, Invalid=2893, Unknown=0, NotChecked=0, Total=3080 [2020-10-29 09:27:30,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-29 09:27:30,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2020-10-29 09:27:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-29 09:27:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2020-10-29 09:27:30,064 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 106 [2020-10-29 09:27:30,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:27:30,064 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2020-10-29 09:27:30,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-29 09:27:30,064 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2020-10-29 09:27:30,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-29 09:27:30,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:27:30,066 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 7, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:27:30,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:27:30,066 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:27:30,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:27:30,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1170847869, now seen corresponding path program 10 times [2020-10-29 09:27:30,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:27:30,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516685000] [2020-10-29 09:27:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:27:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:30,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:34,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:34,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-29 09:27:34,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:34,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4076 [2020-10-29 09:27:34,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:34,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:34,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-29 09:27:34,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:27:34,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-29 09:27:34,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:35,152 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-29 09:27:35,388 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-29 09:27:35,734 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-29 09:27:35,878 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-29 09:27:36,195 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-10-29 09:27:36,387 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-10-29 09:27:36,780 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2020-10-29 09:27:37,573 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 88 [2020-10-29 09:27:38,190 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 78 [2020-10-29 09:27:38,457 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2020-10-29 09:27:38,853 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 90 [2020-10-29 09:27:39,168 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-10-29 09:27:39,499 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-10-29 09:27:39,957 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 112 [2020-10-29 09:27:40,156 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-29 09:27:40,382 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-29 09:27:41,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:27:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:27:41,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:27:41,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:27:41,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:27:41,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:27:41,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:27:41,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:27:41,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:27:41,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:27:41,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:27:41,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:27:41,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:27:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:27:41,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516685000] [2020-10-29 09:27:41,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:27:41,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-29 09:27:41,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139102040] [2020-10-29 09:27:41,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-29 09:27:41,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:27:41,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-29 09:27:41,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:27:41,997 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand 35 states. [2020-10-29 09:27:42,426 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 17 [2020-10-29 09:27:42,709 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 24 [2020-10-29 09:27:43,042 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 29 [2020-10-29 09:27:43,808 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 38 [2020-10-29 09:27:44,220 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 56 [2020-10-29 09:27:44,648 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 47 [2020-10-29 09:27:45,117 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 68 [2020-10-29 09:27:45,771 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 56 [2020-10-29 09:27:46,310 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 76 [2020-10-29 09:27:46,802 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 65 [2020-10-29 09:27:47,209 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-29 09:27:47,744 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 103 [2020-10-29 09:27:48,202 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-29 09:27:48,691 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 80 [2020-10-29 09:27:49,268 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 90 [2020-10-29 09:27:49,802 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 89 [2020-10-29 09:27:50,189 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-10-29 09:27:50,746 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 113 [2020-10-29 09:27:51,450 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 127 [2020-10-29 09:27:52,355 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 129 [2020-10-29 09:27:53,326 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 130 [2020-10-29 09:27:53,823 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 60 [2020-10-29 09:27:54,269 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 53