/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:44:11,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:44:11,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:44:11,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:44:11,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:44:11,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:44:11,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:44:11,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:44:11,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:44:11,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:44:11,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:44:11,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:44:11,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:44:11,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:44:11,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:44:11,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:44:11,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:44:11,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:44:11,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:44:11,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:44:11,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:44:11,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:44:11,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:44:11,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:44:11,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:44:11,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:44:11,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:44:11,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:44:11,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:44:11,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:44:11,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:44:11,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:44:11,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:44:11,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:44:11,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:44:11,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:44:11,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:44:11,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:44:11,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:44:11,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:44:11,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:44:11,251 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 [2020-10-12 15:44:11,274 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:44:11,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:44:11,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:44:11,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:44:11,276 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:44:11,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:44:11,277 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:44:11,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:44:11,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:44:11,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:44:11,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:44:11,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:44:11,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:44:11,278 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:44:11,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:44:11,278 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:44:11,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:44:11,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:44:11,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:44:11,279 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:44:11,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:44:11,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:44:11,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:44:11,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:44:11,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:44:11,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:44:11,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:44:11,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:44:11,281 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:44:11,281 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:44:11,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:44:11,630 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:44:11,637 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:44:11,639 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:44:11,640 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:44:11,641 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i [2020-10-12 15:44:11,702 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/54168ac02/457327340294456cb46b4fa65b68f7ba/FLAG131da0bfb [2020-10-12 15:44:12,252 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:44:12,253 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-2.i [2020-10-12 15:44:12,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/54168ac02/457327340294456cb46b4fa65b68f7ba/FLAG131da0bfb [2020-10-12 15:44:12,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/54168ac02/457327340294456cb46b4fa65b68f7ba [2020-10-12 15:44:12,585 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:44:12,587 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:44:12,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:44:12,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:44:12,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:44:12,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:44:12" (1/1) ... [2020-10-12 15:44:12,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28f2bb90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:12, skipping insertion in model container [2020-10-12 15:44:12,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:44:12" (1/1) ... [2020-10-12 15:44:12,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:44:12,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:44:13,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:44:13,156 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:44:13,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:44:13,267 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:44:13,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:13 WrapperNode [2020-10-12 15:44:13,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:44:13,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:44:13,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:44:13,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:44:13,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:13" (1/1) ... [2020-10-12 15:44:13,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:13" (1/1) ... [2020-10-12 15:44:13,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:13" (1/1) ... [2020-10-12 15:44:13,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:13" (1/1) ... [2020-10-12 15:44:13,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:13" (1/1) ... [2020-10-12 15:44:13,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:13" (1/1) ... [2020-10-12 15:44:13,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:13" (1/1) ... [2020-10-12 15:44:13,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:44:13,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:44:13,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:44:13,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:44:13,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:13" (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 [2020-10-12 15:44:13,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:44:13,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:44:13,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:44:13,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:44:13,404 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-12 15:44:13,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:44:13,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:44:13,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:44:13,405 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:44:13,405 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:44:13,411 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:44:13,411 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:44:13,411 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:44:13,412 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:44:13,412 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:44:13,412 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:44:13,412 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:44:13,412 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:44:13,412 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:44:13,413 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:44:13,413 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:44:13,413 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:44:13,413 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:44:13,413 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:44:13,414 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:44:13,414 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:44:13,414 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:44:13,414 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:44:13,414 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:44:13,414 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:44:13,414 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:44:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:44:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:44:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:44:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:44:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:44:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:44:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:44:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:44:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:44:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:44:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:44:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:44:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:44:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:44:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:44:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:44:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:44:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:44:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:44:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:44:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:44:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:44:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:44:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:44:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:44:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:44:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:44:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:44:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:44:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:44:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:44:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:44:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:44:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:44:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:44:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:44:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:44:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:44:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:44:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:44:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:44:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:44:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:44:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:44:13,421 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:44:13,421 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:44:13,421 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:44:13,421 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:44:13,421 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:44:13,421 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:44:13,421 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:44:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:44:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:44:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:44:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:44:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:44:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:44:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:44:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:44:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:44:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:44:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:44:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:44:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:44:13,424 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:44:13,424 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:44:13,424 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:44:13,424 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:44:13,424 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:44:13,424 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:44:13,424 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:44:13,425 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:44:13,425 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:44:13,425 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:44:13,425 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:44:13,425 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:44:13,425 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:44:13,425 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:44:13,426 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:44:13,426 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:44:13,426 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:44:13,426 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:44:13,426 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-12 15:44:13,426 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:44:13,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:44:13,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:44:13,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:44:13,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:44:13,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:44:13,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:44:13,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:44:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:44:13,753 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-12 15:44:14,108 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:44:14,108 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-12 15:44:14,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:44:14 BoogieIcfgContainer [2020-10-12 15:44:14,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:44:14,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:44:14,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:44:14,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:44:14,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:44:12" (1/3) ... [2020-10-12 15:44:14,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41a9b91b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:44:14, skipping insertion in model container [2020-10-12 15:44:14,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:44:13" (2/3) ... [2020-10-12 15:44:14,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41a9b91b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:44:14, skipping insertion in model container [2020-10-12 15:44:14,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:44:14" (3/3) ... [2020-10-12 15:44:14,122 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-2.i [2020-10-12 15:44:14,133 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:44:14,141 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:44:14,157 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:44:14,184 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:44:14,184 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:44:14,184 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:44:14,188 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:44:14,189 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:44:14,189 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:44:14,189 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:44:14,189 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:44:14,210 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-10-12 15:44:14,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 15:44:14,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:14,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:14,220 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:14,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1575706012, now seen corresponding path program 1 times [2020-10-12 15:44:14,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:14,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536545081] [2020-10-12 15:44:14,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:14,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:14,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:14,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:14,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:14,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:14,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:14,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:14,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:14,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 15:44:14,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:44:14,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 446 [2020-10-12 15:44:14,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:14,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:44:14,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 15:44:14,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:44:14,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:44:14,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:14,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:14,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:14,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:14,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:14,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:44:14,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:14,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:14,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:14,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:14,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:14,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:14,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536545081] [2020-10-12 15:44:14,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:44:14,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:44:14,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734180848] [2020-10-12 15:44:14,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:44:14,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:14,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:44:14,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:44:14,950 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 6 states. [2020-10-12 15:44:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:15,234 INFO L93 Difference]: Finished difference Result 139 states and 213 transitions. [2020-10-12 15:44:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:44:15,236 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-12 15:44:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:15,247 INFO L225 Difference]: With dead ends: 139 [2020-10-12 15:44:15,247 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 15:44:15,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:44:15,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 15:44:15,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2020-10-12 15:44:15,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 15:44:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2020-10-12 15:44:15,300 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 20 [2020-10-12 15:44:15,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:15,301 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2020-10-12 15:44:15,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:44:15,301 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2020-10-12 15:44:15,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 15:44:15,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:15,303 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, 1, 1, 1] [2020-10-12 15:44:15,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:44:15,303 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:15,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:15,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1080561348, now seen corresponding path program 1 times [2020-10-12 15:44:15,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:15,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575606130] [2020-10-12 15:44:15,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:15,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:15,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:15,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:15,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 15:44:15,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:15,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-12 15:44:15,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:15,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:44:15,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 15:44:15,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:44:15,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 15:44:15,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:15,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:15,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:15,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:15,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:15,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:44:15,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:15,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:15,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:15,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:15,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 15:44:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:15,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575606130] [2020-10-12 15:44:15,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:44:15,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:44:15,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235437517] [2020-10-12 15:44:15,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:44:15,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:15,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:44:15,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:44:15,603 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand 6 states. [2020-10-12 15:44:15,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:15,836 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2020-10-12 15:44:15,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:44:15,837 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-12 15:44:15,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:15,838 INFO L225 Difference]: With dead ends: 74 [2020-10-12 15:44:15,839 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 15:44:15,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:44:15,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 15:44:15,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-12 15:44:15,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 15:44:15,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2020-10-12 15:44:15,848 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 27 [2020-10-12 15:44:15,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:15,849 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2020-10-12 15:44:15,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:44:15,849 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2020-10-12 15:44:15,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 15:44:15,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:15,850 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, 1, 1, 1] [2020-10-12 15:44:15,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:44:15,851 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:15,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:15,851 INFO L82 PathProgramCache]: Analyzing trace with hash 2105264324, now seen corresponding path program 1 times [2020-10-12 15:44:15,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:15,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696402925] [2020-10-12 15:44:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:15,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:15,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:16,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:16,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 15:44:16,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:16,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-12 15:44:16,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:16,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:44:16,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 15:44:16,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:44:16,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:16,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:16,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:16,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:16,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:16,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:16,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:44:16,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:16,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:16,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:16,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:16,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:16,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696402925] [2020-10-12 15:44:16,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:44:16,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:44:16,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066063138] [2020-10-12 15:44:16,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:44:16,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:16,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:44:16,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:44:16,075 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand 6 states. [2020-10-12 15:44:16,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:16,273 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2020-10-12 15:44:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:44:16,274 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-12 15:44:16,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:16,275 INFO L225 Difference]: With dead ends: 74 [2020-10-12 15:44:16,275 INFO L226 Difference]: Without dead ends: 63 [2020-10-12 15:44:16,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:44:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-12 15:44:16,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-10-12 15:44:16,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 15:44:16,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2020-10-12 15:44:16,283 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 27 [2020-10-12 15:44:16,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:16,283 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2020-10-12 15:44:16,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:44:16,283 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2020-10-12 15:44:16,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:44:16,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:16,285 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, 1, 1, 1, 1, 1] [2020-10-12 15:44:16,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:44:16,285 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:16,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:16,286 INFO L82 PathProgramCache]: Analyzing trace with hash -321247536, now seen corresponding path program 1 times [2020-10-12 15:44:16,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:16,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179421842] [2020-10-12 15:44:16,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:16,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:16,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:16,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:16,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:16,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 15:44:16,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:44:16,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-12 15:44:16,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:16,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:44:16,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 15:44:16,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:44:16,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:16,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:16,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:16,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:16,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:16,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:16,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:16,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:16,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:16,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:16,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:16,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:16,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179421842] [2020-10-12 15:44:16,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:16,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:44:16,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252470901] [2020-10-12 15:44:16,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:44:16,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:16,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:44:16,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:44:16,820 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand 10 states. [2020-10-12 15:44:17,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:17,132 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2020-10-12 15:44:17,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:44:17,133 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-12 15:44:17,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:17,134 INFO L225 Difference]: With dead ends: 76 [2020-10-12 15:44:17,135 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 15:44:17,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:44:17,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 15:44:17,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2020-10-12 15:44:17,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 15:44:17,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2020-10-12 15:44:17,142 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 29 [2020-10-12 15:44:17,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:17,143 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2020-10-12 15:44:17,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:44:17,143 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2020-10-12 15:44:17,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:44:17,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:17,144 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, 1, 1, 1, 1, 1] [2020-10-12 15:44:17,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:44:17,145 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:17,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:17,145 INFO L82 PathProgramCache]: Analyzing trace with hash 542154128, now seen corresponding path program 1 times [2020-10-12 15:44:17,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:17,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433248739] [2020-10-12 15:44:17,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:17,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:17,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:17,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:17,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:17,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 15:44:17,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:44:17,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-12 15:44:17,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:17,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:44:17,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 15:44:17,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:44:17,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:17,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:17,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:17,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:17,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:17,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:17,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:17,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:17,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:17,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:17,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:17,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:17,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433248739] [2020-10-12 15:44:17,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:17,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:44:17,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36884394] [2020-10-12 15:44:17,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:44:17,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:17,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:44:17,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:44:17,558 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand 10 states. [2020-10-12 15:44:17,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:17,872 INFO L93 Difference]: Finished difference Result 85 states and 109 transitions. [2020-10-12 15:44:17,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:44:17,873 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-12 15:44:17,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:17,875 INFO L225 Difference]: With dead ends: 85 [2020-10-12 15:44:17,875 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 15:44:17,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:44:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 15:44:17,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2020-10-12 15:44:17,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 15:44:17,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 85 transitions. [2020-10-12 15:44:17,884 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 85 transitions. Word has length 29 [2020-10-12 15:44:17,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:17,884 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 85 transitions. [2020-10-12 15:44:17,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:44:17,884 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 85 transitions. [2020-10-12 15:44:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 15:44:17,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:17,885 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:17,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:44:17,886 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:17,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:17,886 INFO L82 PathProgramCache]: Analyzing trace with hash 567443435, now seen corresponding path program 1 times [2020-10-12 15:44:17,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:17,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181304426] [2020-10-12 15:44:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:17,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:17,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:18,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:18,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 15:44:18,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:18,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-12 15:44:18,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:18,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:44:18,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:18,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:44:18,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:18,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:18,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:18,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:18,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:18,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:18,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:18,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:18,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:18,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:18,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:18,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:18,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181304426] [2020-10-12 15:44:18,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:18,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:44:18,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867218943] [2020-10-12 15:44:18,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:44:18,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:18,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:44:18,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:44:18,386 INFO L87 Difference]: Start difference. First operand 64 states and 85 transitions. Second operand 10 states. [2020-10-12 15:44:18,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:18,873 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2020-10-12 15:44:18,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:44:18,874 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-12 15:44:18,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:18,875 INFO L225 Difference]: With dead ends: 84 [2020-10-12 15:44:18,875 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 15:44:18,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:44:18,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 15:44:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-10-12 15:44:18,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 15:44:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2020-10-12 15:44:18,883 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 31 [2020-10-12 15:44:18,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:18,883 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2020-10-12 15:44:18,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:44:18,884 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2020-10-12 15:44:18,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:44:18,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:18,885 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:18,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:44:18,886 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:18,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:18,886 INFO L82 PathProgramCache]: Analyzing trace with hash -99025338, now seen corresponding path program 2 times [2020-10-12 15:44:18,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:18,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915126893] [2020-10-12 15:44:18,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:18,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:18,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:19,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:19,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:44:19,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:19,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-12 15:44:19,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:19,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:44:19,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:19,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:44:19,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:19,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:19,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:19,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:19,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:19,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:19,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:44:19,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:19,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:19,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:19,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:19,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:19,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915126893] [2020-10-12 15:44:19,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:19,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:44:19,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765691838] [2020-10-12 15:44:19,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:44:19,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:19,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:44:19,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:44:19,374 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand 10 states. [2020-10-12 15:44:19,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:19,864 INFO L93 Difference]: Finished difference Result 86 states and 109 transitions. [2020-10-12 15:44:19,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:44:19,865 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-12 15:44:19,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:19,866 INFO L225 Difference]: With dead ends: 86 [2020-10-12 15:44:19,866 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 15:44:19,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:44:19,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 15:44:19,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2020-10-12 15:44:19,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 15:44:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2020-10-12 15:44:19,885 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 33 [2020-10-12 15:44:19,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:19,886 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2020-10-12 15:44:19,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:44:19,886 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2020-10-12 15:44:19,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:44:19,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:19,889 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:19,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:44:19,893 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:19,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:19,893 INFO L82 PathProgramCache]: Analyzing trace with hash 2117726790, now seen corresponding path program 1 times [2020-10-12 15:44:19,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:19,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886543723] [2020-10-12 15:44:19,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:19,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:19,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:19,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:20,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:20,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:44:20,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:44:20,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 576 [2020-10-12 15:44:20,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:20,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:44:20,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:20,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:44:20,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:20,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:20,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:20,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:20,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:20,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:20,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:20,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:20,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:20,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:20,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:20,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:20,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886543723] [2020-10-12 15:44:20,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:20,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:44:20,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776449624] [2020-10-12 15:44:20,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:44:20,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:20,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:44:20,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:44:20,612 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 10 states. [2020-10-12 15:44:20,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:20,961 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2020-10-12 15:44:20,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:44:20,962 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-12 15:44:20,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:20,963 INFO L225 Difference]: With dead ends: 84 [2020-10-12 15:44:20,963 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 15:44:20,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:44:20,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 15:44:20,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2020-10-12 15:44:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 15:44:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2020-10-12 15:44:20,971 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 33 [2020-10-12 15:44:20,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:20,972 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2020-10-12 15:44:20,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:44:20,972 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2020-10-12 15:44:20,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:44:20,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:20,973 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:20,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:44:20,974 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:20,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:20,974 INFO L82 PathProgramCache]: Analyzing trace with hash 493677111, now seen corresponding path program 2 times [2020-10-12 15:44:20,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:20,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995409377] [2020-10-12 15:44:20,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:20,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:20,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:21,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:21,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:44:21,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:21,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-10-12 15:44:21,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:21,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:44:21,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:21,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:44:21,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:21,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:21,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:21,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:21,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:21,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:21,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:21,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:21,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:21,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:21,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:21,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:21,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995409377] [2020-10-12 15:44:21,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:21,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:44:21,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676076186] [2020-10-12 15:44:21,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:44:21,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:21,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:44:21,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:44:21,448 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand 11 states. [2020-10-12 15:44:21,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:21,749 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2020-10-12 15:44:21,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:44:21,750 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-12 15:44:21,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:21,751 INFO L225 Difference]: With dead ends: 82 [2020-10-12 15:44:21,751 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 15:44:21,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:44:21,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 15:44:21,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2020-10-12 15:44:21,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 15:44:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 91 transitions. [2020-10-12 15:44:21,757 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 91 transitions. Word has length 33 [2020-10-12 15:44:21,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:21,758 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 91 transitions. [2020-10-12 15:44:21,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:44:21,758 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 91 transitions. [2020-10-12 15:44:21,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:44:21,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:21,759 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:21,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:44:21,760 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:21,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:21,761 INFO L82 PathProgramCache]: Analyzing trace with hash 793379063, now seen corresponding path program 1 times [2020-10-12 15:44:21,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:21,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964278880] [2020-10-12 15:44:21,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:21,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:21,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:22,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:22,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:44:22,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:22,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-12 15:44:22,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:22,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:44:22,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:22,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:44:22,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:22,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:22,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:22,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:22,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:22,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:22,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:22,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:22,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:22,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:22,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:22,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:22,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964278880] [2020-10-12 15:44:22,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:22,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:44:22,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861400924] [2020-10-12 15:44:22,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:44:22,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:22,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:44:22,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:44:22,249 INFO L87 Difference]: Start difference. First operand 70 states and 91 transitions. Second operand 11 states. [2020-10-12 15:44:22,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:22,546 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2020-10-12 15:44:22,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:44:22,546 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-12 15:44:22,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:22,547 INFO L225 Difference]: With dead ends: 78 [2020-10-12 15:44:22,548 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 15:44:22,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:44:22,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 15:44:22,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-12 15:44:22,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 15:44:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2020-10-12 15:44:22,553 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 33 [2020-10-12 15:44:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:22,553 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2020-10-12 15:44:22,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:44:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2020-10-12 15:44:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:44:22,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:22,554 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, 1, 1, 1, 1, 1] [2020-10-12 15:44:22,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:44:22,555 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:22,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:22,555 INFO L82 PathProgramCache]: Analyzing trace with hash 2025981330, now seen corresponding path program 3 times [2020-10-12 15:44:22,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:22,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084387361] [2020-10-12 15:44:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:22,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:22,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:22,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:22,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:44:22,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:22,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 316 [2020-10-12 15:44:22,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:22,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:44:22,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:22,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:44:22,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:23,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:23,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:23,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:23,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:23,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:23,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:23,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:23,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:23,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:23,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:23,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:23,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084387361] [2020-10-12 15:44:23,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:23,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:44:23,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551280579] [2020-10-12 15:44:23,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:44:23,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:23,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:44:23,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:44:23,105 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand 12 states. [2020-10-12 15:44:23,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:23,756 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2020-10-12 15:44:23,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:44:23,756 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-12 15:44:23,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:23,757 INFO L225 Difference]: With dead ends: 102 [2020-10-12 15:44:23,758 INFO L226 Difference]: Without dead ends: 98 [2020-10-12 15:44:23,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:44:23,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-12 15:44:23,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2020-10-12 15:44:23,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 15:44:23,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 112 transitions. [2020-10-12 15:44:23,767 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 112 transitions. Word has length 35 [2020-10-12 15:44:23,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:23,768 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 112 transitions. [2020-10-12 15:44:23,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:44:23,768 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 112 transitions. [2020-10-12 15:44:23,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:44:23,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:23,769 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, 1, 1, 1, 1, 1] [2020-10-12 15:44:23,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:44:23,770 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:23,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:23,770 INFO L82 PathProgramCache]: Analyzing trace with hash -193204974, now seen corresponding path program 1 times [2020-10-12 15:44:23,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:23,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473217052] [2020-10-12 15:44:23,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:23,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:23,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:24,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:24,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:44:24,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:24,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-12 15:44:24,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:24,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:44:24,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:24,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:44:24,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:24,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:24,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:24,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:24,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:24,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:24,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:24,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:24,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:24,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:24,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:24,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:24,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473217052] [2020-10-12 15:44:24,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:24,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:44:24,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108903997] [2020-10-12 15:44:24,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:44:24,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:24,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:44:24,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:44:24,412 INFO L87 Difference]: Start difference. First operand 88 states and 112 transitions. Second operand 12 states. [2020-10-12 15:44:25,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:25,016 INFO L93 Difference]: Finished difference Result 113 states and 141 transitions. [2020-10-12 15:44:25,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:44:25,016 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-12 15:44:25,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:25,017 INFO L225 Difference]: With dead ends: 113 [2020-10-12 15:44:25,018 INFO L226 Difference]: Without dead ends: 107 [2020-10-12 15:44:25,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:44:25,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-12 15:44:25,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2020-10-12 15:44:25,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 15:44:25,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 123 transitions. [2020-10-12 15:44:25,026 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 123 transitions. Word has length 35 [2020-10-12 15:44:25,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:25,026 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 123 transitions. [2020-10-12 15:44:25,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:44:25,026 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 123 transitions. [2020-10-12 15:44:25,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:44:25,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:25,028 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:25,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:44:25,028 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:25,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:25,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1396553261, now seen corresponding path program 4 times [2020-10-12 15:44:25,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:25,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954685322] [2020-10-12 15:44:25,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:25,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:25,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:25,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:25,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 15:44:25,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:25,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-10-12 15:44:25,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:25,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:44:25,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:25,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:44:25,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:25,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:25,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:25,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:25,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:25,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:25,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:25,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:25,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:25,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:25,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:25,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:25,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954685322] [2020-10-12 15:44:25,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:25,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:44:25,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034575490] [2020-10-12 15:44:25,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:44:25,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:25,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:44:25,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:44:25,838 INFO L87 Difference]: Start difference. First operand 97 states and 123 transitions. Second operand 13 states. [2020-10-12 15:44:26,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:26,745 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2020-10-12 15:44:26,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:44:26,746 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-12 15:44:26,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:26,747 INFO L225 Difference]: With dead ends: 117 [2020-10-12 15:44:26,747 INFO L226 Difference]: Without dead ends: 113 [2020-10-12 15:44:26,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:44:26,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-12 15:44:26,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2020-10-12 15:44:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 15:44:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 130 transitions. [2020-10-12 15:44:26,756 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 130 transitions. Word has length 37 [2020-10-12 15:44:26,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:26,756 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 130 transitions. [2020-10-12 15:44:26,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:44:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 130 transitions. [2020-10-12 15:44:26,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:44:26,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:26,757 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:26,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:44:26,757 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:26,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:26,758 INFO L82 PathProgramCache]: Analyzing trace with hash 2106567688, now seen corresponding path program 5 times [2020-10-12 15:44:26,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:26,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62423153] [2020-10-12 15:44:26,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:26,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:26,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:27,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:27,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:44:27,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:27,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-10-12 15:44:27,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:27,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:44:27,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:27,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 15:44:27,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:27,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:27,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:27,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:27,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:27,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:27,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:27,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:27,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:27,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:27,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:27,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:27,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62423153] [2020-10-12 15:44:27,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:27,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:44:27,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729525163] [2020-10-12 15:44:27,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:44:27,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:27,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:44:27,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:44:27,611 INFO L87 Difference]: Start difference. First operand 103 states and 130 transitions. Second operand 13 states. [2020-10-12 15:44:28,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:28,260 INFO L93 Difference]: Finished difference Result 119 states and 147 transitions. [2020-10-12 15:44:28,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:44:28,263 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-12 15:44:28,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:28,264 INFO L225 Difference]: With dead ends: 119 [2020-10-12 15:44:28,265 INFO L226 Difference]: Without dead ends: 107 [2020-10-12 15:44:28,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:44:28,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-12 15:44:28,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2020-10-12 15:44:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 15:44:28,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2020-10-12 15:44:28,272 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 39 [2020-10-12 15:44:28,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:28,273 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2020-10-12 15:44:28,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:44:28,273 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2020-10-12 15:44:28,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:44:28,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:28,274 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:28,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:44:28,274 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:28,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:28,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1168680440, now seen corresponding path program 2 times [2020-10-12 15:44:28,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:28,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48124275] [2020-10-12 15:44:28,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:28,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:28,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:28,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:28,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:28,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:29,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:30,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:30,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:44:30,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:44:30,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1819 [2020-10-12 15:44:30,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:30,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:44:30,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 15:44:30,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:44:30,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:30,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:30,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:30,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:30,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:30,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:30,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:30,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:30,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:30,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:30,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:30,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:30,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48124275] [2020-10-12 15:44:30,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:30,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:44:30,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358496568] [2020-10-12 15:44:30,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:44:30,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:30,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:44:30,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:44:30,640 INFO L87 Difference]: Start difference. First operand 89 states and 113 transitions. Second operand 13 states. [2020-10-12 15:44:31,208 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 68 [2020-10-12 15:44:31,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:31,478 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2020-10-12 15:44:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:44:31,479 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-12 15:44:31,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:31,480 INFO L225 Difference]: With dead ends: 108 [2020-10-12 15:44:31,480 INFO L226 Difference]: Without dead ends: 93 [2020-10-12 15:44:31,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:44:31,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-12 15:44:31,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-10-12 15:44:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 15:44:31,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-10-12 15:44:31,486 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 39 [2020-10-12 15:44:31,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:31,486 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-10-12 15:44:31,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:44:31,487 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-10-12 15:44:31,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:44:31,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:31,487 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:31,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:44:31,488 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:31,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:31,488 INFO L82 PathProgramCache]: Analyzing trace with hash 462970809, now seen corresponding path program 6 times [2020-10-12 15:44:31,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:31,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749218200] [2020-10-12 15:44:31,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:31,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:31,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:31,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:31,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:44:31,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:31,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-12 15:44:31,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:31,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:44:31,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:31,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:44:31,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:32,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:32,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:32,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:32,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:32,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:32,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:44:32,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:32,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:32,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:32,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:32,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:32,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749218200] [2020-10-12 15:44:32,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:32,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:44:32,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413383318] [2020-10-12 15:44:32,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:44:32,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:32,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:44:32,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:44:32,189 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 14 states. [2020-10-12 15:44:32,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:32,769 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2020-10-12 15:44:32,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:44:32,769 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-12 15:44:32,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:32,770 INFO L225 Difference]: With dead ends: 113 [2020-10-12 15:44:32,770 INFO L226 Difference]: Without dead ends: 109 [2020-10-12 15:44:32,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:44:32,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-12 15:44:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 102. [2020-10-12 15:44:32,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-12 15:44:32,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 128 transitions. [2020-10-12 15:44:32,777 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 128 transitions. Word has length 39 [2020-10-12 15:44:32,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:32,777 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 128 transitions. [2020-10-12 15:44:32,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:44:32,778 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 128 transitions. [2020-10-12 15:44:32,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:44:32,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:32,778 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:32,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:44:32,779 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:32,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:32,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1472700216, now seen corresponding path program 1 times [2020-10-12 15:44:32,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:32,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401153902] [2020-10-12 15:44:32,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:32,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:32,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:32,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:33,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:33,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:44:33,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:44:33,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 883 [2020-10-12 15:44:33,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:33,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:44:33,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:33,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:44:33,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:33,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:33,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:33,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:33,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:33,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:33,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:33,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:33,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:33,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:33,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:33,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:34,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401153902] [2020-10-12 15:44:34,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:34,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:44:34,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426089559] [2020-10-12 15:44:34,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:44:34,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:34,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:44:34,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:44:34,006 INFO L87 Difference]: Start difference. First operand 102 states and 128 transitions. Second operand 13 states. [2020-10-12 15:44:34,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:34,621 INFO L93 Difference]: Finished difference Result 120 states and 147 transitions. [2020-10-12 15:44:34,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:44:34,622 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-12 15:44:34,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:34,623 INFO L225 Difference]: With dead ends: 120 [2020-10-12 15:44:34,623 INFO L226 Difference]: Without dead ends: 105 [2020-10-12 15:44:34,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:44:34,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-12 15:44:34,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2020-10-12 15:44:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 15:44:34,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 121 transitions. [2020-10-12 15:44:34,630 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 121 transitions. Word has length 39 [2020-10-12 15:44:34,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:34,630 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 121 transitions. [2020-10-12 15:44:34,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:44:34,631 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 121 transitions. [2020-10-12 15:44:34,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:44:34,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:34,631 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:34,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:44:34,632 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:34,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:34,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1434421049, now seen corresponding path program 2 times [2020-10-12 15:44:34,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:34,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573264548] [2020-10-12 15:44:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:34,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:34,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:35,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:35,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:44:35,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:35,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 502 [2020-10-12 15:44:35,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:35,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:44:35,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:35,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 15:44:35,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:35,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:35,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:35,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:35,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:35,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:35,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:35,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:35,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:35,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:35,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:35,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:35,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573264548] [2020-10-12 15:44:35,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:35,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:44:35,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138263896] [2020-10-12 15:44:35,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:44:35,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:35,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:44:35,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:44:35,414 INFO L87 Difference]: Start difference. First operand 97 states and 121 transitions. Second operand 14 states. [2020-10-12 15:44:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:36,110 INFO L93 Difference]: Finished difference Result 105 states and 130 transitions. [2020-10-12 15:44:36,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:44:36,110 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-12 15:44:36,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:36,111 INFO L225 Difference]: With dead ends: 105 [2020-10-12 15:44:36,112 INFO L226 Difference]: Without dead ends: 99 [2020-10-12 15:44:36,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:44:36,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-12 15:44:36,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-12 15:44:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 15:44:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2020-10-12 15:44:36,119 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 39 [2020-10-12 15:44:36,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:36,119 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2020-10-12 15:44:36,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:44:36,119 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2020-10-12 15:44:36,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:44:36,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:36,120 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:36,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:44:36,120 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:36,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1712971116, now seen corresponding path program 7 times [2020-10-12 15:44:36,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:36,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337264141] [2020-10-12 15:44:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:36,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:36,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:36,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:36,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 15:44:36,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:36,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-12 15:44:36,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:36,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:44:36,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:36,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:44:36,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:36,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:36,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:36,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:36,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:36,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:36,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:36,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:36,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:36,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337264141] [2020-10-12 15:44:36,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:36,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:44:36,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403175467] [2020-10-12 15:44:37,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:44:37,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:37,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:44:37,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:44:37,001 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand 15 states. [2020-10-12 15:44:38,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:38,180 INFO L93 Difference]: Finished difference Result 144 states and 174 transitions. [2020-10-12 15:44:38,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:44:38,180 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-12 15:44:38,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:38,182 INFO L225 Difference]: With dead ends: 144 [2020-10-12 15:44:38,182 INFO L226 Difference]: Without dead ends: 140 [2020-10-12 15:44:38,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:44:38,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-12 15:44:38,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 122. [2020-10-12 15:44:38,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-12 15:44:38,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 150 transitions. [2020-10-12 15:44:38,190 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 150 transitions. Word has length 41 [2020-10-12 15:44:38,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:38,191 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 150 transitions. [2020-10-12 15:44:38,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:44:38,191 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 150 transitions. [2020-10-12 15:44:38,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 15:44:38,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:38,192 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:38,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 15:44:38,192 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:38,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:38,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1167211220, now seen corresponding path program 2 times [2020-10-12 15:44:38,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:38,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002557679] [2020-10-12 15:44:38,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:38,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:38,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:38,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:38,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 15:44:38,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:38,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 698 [2020-10-12 15:44:38,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:38,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:44:38,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:38,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:44:38,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:39,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:39,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:39,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:39,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:39,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:39,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:39,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:39,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:39,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:39,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:39,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:44:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:39,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002557679] [2020-10-12 15:44:39,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:39,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:44:39,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44819697] [2020-10-12 15:44:39,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:44:39,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:39,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:44:39,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:44:39,407 INFO L87 Difference]: Start difference. First operand 122 states and 150 transitions. Second operand 15 states. [2020-10-12 15:44:40,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:40,769 INFO L93 Difference]: Finished difference Result 151 states and 183 transitions. [2020-10-12 15:44:40,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:44:40,769 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-12 15:44:40,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:40,770 INFO L225 Difference]: With dead ends: 151 [2020-10-12 15:44:40,771 INFO L226 Difference]: Without dead ends: 145 [2020-10-12 15:44:40,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:44:40,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-12 15:44:40,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2020-10-12 15:44:40,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 15:44:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 161 transitions. [2020-10-12 15:44:40,778 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 161 transitions. Word has length 41 [2020-10-12 15:44:40,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:40,778 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 161 transitions. [2020-10-12 15:44:40,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:44:40,779 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 161 transitions. [2020-10-12 15:44:40,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:44:40,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:40,779 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:40,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 15:44:40,780 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:40,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:40,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1144087889, now seen corresponding path program 8 times [2020-10-12 15:44:40,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:40,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049591125] [2020-10-12 15:44:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:40,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:40,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:41,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:41,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:44:41,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:41,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 499 [2020-10-12 15:44:41,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:41,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:44:41,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:41,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:44:41,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:41,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:41,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:41,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:41,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:41,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:41,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:41,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:41,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:41,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:41,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:41,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:41,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049591125] [2020-10-12 15:44:41,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:41,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:44:41,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400258281] [2020-10-12 15:44:41,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:44:41,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:41,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:44:41,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:44:41,945 INFO L87 Difference]: Start difference. First operand 131 states and 161 transitions. Second operand 16 states. [2020-10-12 15:44:42,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:42,916 INFO L93 Difference]: Finished difference Result 161 states and 194 transitions. [2020-10-12 15:44:42,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:44:42,916 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-12 15:44:42,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:42,918 INFO L225 Difference]: With dead ends: 161 [2020-10-12 15:44:42,918 INFO L226 Difference]: Without dead ends: 157 [2020-10-12 15:44:42,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:44:42,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-12 15:44:42,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 139. [2020-10-12 15:44:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-12 15:44:42,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 170 transitions. [2020-10-12 15:44:42,928 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 170 transitions. Word has length 43 [2020-10-12 15:44:42,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:42,928 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 170 transitions. [2020-10-12 15:44:42,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:44:42,928 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 170 transitions. [2020-10-12 15:44:42,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:44:42,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:42,929 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:42,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 15:44:42,929 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:42,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:42,930 INFO L82 PathProgramCache]: Analyzing trace with hash 91846666, now seen corresponding path program 9 times [2020-10-12 15:44:42,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:42,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108919740] [2020-10-12 15:44:42,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:42,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:42,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:43,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:43,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 15:44:43,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:43,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 702 [2020-10-12 15:44:43,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:43,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:44:43,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:43,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:44:43,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:44,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:44,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:44,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:44,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:44,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:44,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:44,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:44,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:44,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:44,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:44,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:44,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108919740] [2020-10-12 15:44:44,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:44,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:44:44,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293423468] [2020-10-12 15:44:44,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:44:44,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:44,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:44:44,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:44:44,381 INFO L87 Difference]: Start difference. First operand 139 states and 170 transitions. Second operand 16 states. [2020-10-12 15:44:45,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:45,634 INFO L93 Difference]: Finished difference Result 163 states and 196 transitions. [2020-10-12 15:44:45,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:44:45,637 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-12 15:44:45,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:45,639 INFO L225 Difference]: With dead ends: 163 [2020-10-12 15:44:45,639 INFO L226 Difference]: Without dead ends: 149 [2020-10-12 15:44:45,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:44:45,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-12 15:44:45,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 120. [2020-10-12 15:44:45,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-12 15:44:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 148 transitions. [2020-10-12 15:44:45,647 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 148 transitions. Word has length 45 [2020-10-12 15:44:45,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:45,647 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 148 transitions. [2020-10-12 15:44:45,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:44:45,647 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 148 transitions. [2020-10-12 15:44:45,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:44:45,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:45,648 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:45,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 15:44:45,649 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:45,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:45,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1814126602, now seen corresponding path program 3 times [2020-10-12 15:44:45,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:45,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663856186] [2020-10-12 15:44:45,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:45,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:45,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:45,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:45,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:46,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:46,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:46,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:47,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:49,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:49,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 15:44:49,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:44:49,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3964 [2020-10-12 15:44:49,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:49,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:44:49,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:49,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:44:49,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:49,941 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-12 15:44:50,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:50,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:50,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:50,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:50,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:50,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:50,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:50,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:50,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:50,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:50,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:50,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663856186] [2020-10-12 15:44:50,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:50,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:44:50,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334113191] [2020-10-12 15:44:50,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:44:50,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:50,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:44:50,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:44:50,332 INFO L87 Difference]: Start difference. First operand 120 states and 148 transitions. Second operand 16 states. [2020-10-12 15:44:51,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:51,472 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2020-10-12 15:44:51,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:44:51,473 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-12 15:44:51,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:51,474 INFO L225 Difference]: With dead ends: 140 [2020-10-12 15:44:51,474 INFO L226 Difference]: Without dead ends: 123 [2020-10-12 15:44:51,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:44:51,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-12 15:44:51,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 115. [2020-10-12 15:44:51,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 15:44:51,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 140 transitions. [2020-10-12 15:44:51,482 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 140 transitions. Word has length 45 [2020-10-12 15:44:51,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:51,482 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 140 transitions. [2020-10-12 15:44:51,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:44:51,482 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 140 transitions. [2020-10-12 15:44:51,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:44:51,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:51,483 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:51,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 15:44:51,483 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:51,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:51,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1143210875, now seen corresponding path program 10 times [2020-10-12 15:44:51,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:51,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351481965] [2020-10-12 15:44:51,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:51,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:51,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:52,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:52,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 15:44:52,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:52,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-12 15:44:52,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:52,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:44:52,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:52,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:44:52,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:52,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:52,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:52,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:52,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:52,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:52,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:52,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:52,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:52,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:52,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:52,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:52,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351481965] [2020-10-12 15:44:52,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:52,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:44:52,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219360768] [2020-10-12 15:44:52,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:44:52,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:52,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:44:52,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:44:52,581 INFO L87 Difference]: Start difference. First operand 115 states and 140 transitions. Second operand 17 states. [2020-10-12 15:44:53,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:53,836 INFO L93 Difference]: Finished difference Result 134 states and 161 transitions. [2020-10-12 15:44:53,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:44:53,837 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-12 15:44:53,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:53,838 INFO L225 Difference]: With dead ends: 134 [2020-10-12 15:44:53,838 INFO L226 Difference]: Without dead ends: 130 [2020-10-12 15:44:53,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:44:53,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-12 15:44:53,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-12 15:44:53,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-12 15:44:53,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 157 transitions. [2020-10-12 15:44:53,846 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 157 transitions. Word has length 45 [2020-10-12 15:44:53,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:53,847 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 157 transitions. [2020-10-12 15:44:53,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:44:53,847 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 157 transitions. [2020-10-12 15:44:53,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:44:53,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:53,848 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:53,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 15:44:53,848 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:53,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:53,848 INFO L82 PathProgramCache]: Analyzing trace with hash 824441787, now seen corresponding path program 3 times [2020-10-12 15:44:53,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:53,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971616684] [2020-10-12 15:44:53,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:53,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:53,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:54,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:54,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 15:44:54,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:54,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 889 [2020-10-12 15:44:54,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:54,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:44:54,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:54,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:44:54,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:55,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:55,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:55,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:55,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:55,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:55,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:55,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:55,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:55,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:55,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:55,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:55,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971616684] [2020-10-12 15:44:55,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:55,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:44:55,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53520007] [2020-10-12 15:44:55,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:44:55,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:55,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:44:55,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:44:55,303 INFO L87 Difference]: Start difference. First operand 130 states and 157 transitions. Second operand 17 states. [2020-10-12 15:44:56,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:56,309 INFO L93 Difference]: Finished difference Result 138 states and 166 transitions. [2020-10-12 15:44:56,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:44:56,310 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-12 15:44:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:56,311 INFO L225 Difference]: With dead ends: 138 [2020-10-12 15:44:56,311 INFO L226 Difference]: Without dead ends: 132 [2020-10-12 15:44:56,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:44:56,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-12 15:44:56,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-10-12 15:44:56,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-12 15:44:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 159 transitions. [2020-10-12 15:44:56,319 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 159 transitions. Word has length 45 [2020-10-12 15:44:56,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:56,320 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 159 transitions. [2020-10-12 15:44:56,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:44:56,320 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 159 transitions. [2020-10-12 15:44:56,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:44:56,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:56,321 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:56,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 15:44:56,321 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:56,322 INFO L82 PathProgramCache]: Analyzing trace with hash -837296682, now seen corresponding path program 11 times [2020-10-12 15:44:56,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:56,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835813692] [2020-10-12 15:44:56,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:56,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:56,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:57,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:57,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:44:57,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:44:57,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 729 [2020-10-12 15:44:57,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:57,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:44:57,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:44:57,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:44:57,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:57,343 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-12 15:44:57,631 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-12 15:44:57,947 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-12 15:44:58,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:44:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:58,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:58,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:44:58,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:44:58,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:44:58,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:44:58,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:44:58,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:44:58,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:44:58,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:44:58,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:44:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:44:58,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835813692] [2020-10-12 15:44:58,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:44:58,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:44:58,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567388618] [2020-10-12 15:44:58,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:44:58,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:44:58,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:44:58,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:44:58,206 INFO L87 Difference]: Start difference. First operand 132 states and 159 transitions. Second operand 18 states. [2020-10-12 15:44:58,971 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-12 15:44:59,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:44:59,489 INFO L93 Difference]: Finished difference Result 194 states and 229 transitions. [2020-10-12 15:44:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:44:59,490 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-12 15:44:59,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:44:59,492 INFO L225 Difference]: With dead ends: 194 [2020-10-12 15:44:59,492 INFO L226 Difference]: Without dead ends: 190 [2020-10-12 15:44:59,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:44:59,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-12 15:44:59,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 162. [2020-10-12 15:44:59,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-12 15:44:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 194 transitions. [2020-10-12 15:44:59,501 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 194 transitions. Word has length 47 [2020-10-12 15:44:59,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:44:59,502 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 194 transitions. [2020-10-12 15:44:59,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:44:59,502 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 194 transitions. [2020-10-12 15:44:59,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 15:44:59,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:44:59,503 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:44:59,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 15:44:59,504 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:44:59,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:44:59,504 INFO L82 PathProgramCache]: Analyzing trace with hash -956242218, now seen corresponding path program 3 times [2020-10-12 15:44:59,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:44:59,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320382534] [2020-10-12 15:44:59,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:44:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:44:59,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:44:59,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:00,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:00,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:45:00,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:00,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 784 [2020-10-12 15:45:00,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:00,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:45:00,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:45:00,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:45:00,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:00,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:00,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:00,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:00,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:00,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:00,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:00,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:00,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:00,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:00,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:00,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:00,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320382534] [2020-10-12 15:45:00,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:00,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:45:00,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807294236] [2020-10-12 15:45:00,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:45:00,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:00,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:45:00,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:45:00,872 INFO L87 Difference]: Start difference. First operand 162 states and 194 transitions. Second operand 18 states. [2020-10-12 15:45:02,034 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-12 15:45:02,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:02,611 INFO L93 Difference]: Finished difference Result 195 states and 231 transitions. [2020-10-12 15:45:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:45:02,612 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-12 15:45:02,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:02,613 INFO L225 Difference]: With dead ends: 195 [2020-10-12 15:45:02,614 INFO L226 Difference]: Without dead ends: 189 [2020-10-12 15:45:02,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:45:02,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-12 15:45:02,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 171. [2020-10-12 15:45:02,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-12 15:45:02,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 205 transitions. [2020-10-12 15:45:02,624 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 205 transitions. Word has length 47 [2020-10-12 15:45:02,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:02,624 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 205 transitions. [2020-10-12 15:45:02,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:45:02,624 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 205 transitions. [2020-10-12 15:45:02,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 15:45:02,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:02,625 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:02,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 15:45:02,626 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:02,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:02,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1434546831, now seen corresponding path program 12 times [2020-10-12 15:45:02,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:02,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699052143] [2020-10-12 15:45:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:02,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:02,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:03,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:03,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 15:45:03,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:03,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 601 [2020-10-12 15:45:03,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:03,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:45:03,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:45:03,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:45:03,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:03,545 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-12 15:45:03,686 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-12 15:45:03,866 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-12 15:45:04,008 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-12 15:45:04,142 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-12 15:45:04,275 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-12 15:45:04,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:04,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:04,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:04,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:04,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:04,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:04,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:04,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:04,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:04,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:04,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:04,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699052143] [2020-10-12 15:45:04,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:04,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:45:04,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44223218] [2020-10-12 15:45:04,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:45:04,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:04,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:45:04,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:45:04,510 INFO L87 Difference]: Start difference. First operand 171 states and 205 transitions. Second operand 19 states. [2020-10-12 15:45:05,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:05,887 INFO L93 Difference]: Finished difference Result 213 states and 251 transitions. [2020-10-12 15:45:05,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:45:05,887 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-10-12 15:45:05,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:05,889 INFO L225 Difference]: With dead ends: 213 [2020-10-12 15:45:05,889 INFO L226 Difference]: Without dead ends: 209 [2020-10-12 15:45:05,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:45:05,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-12 15:45:05,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 181. [2020-10-12 15:45:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-12 15:45:05,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 216 transitions. [2020-10-12 15:45:05,905 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 216 transitions. Word has length 49 [2020-10-12 15:45:05,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:05,906 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 216 transitions. [2020-10-12 15:45:05,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:45:05,906 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 216 transitions. [2020-10-12 15:45:05,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 15:45:05,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:05,908 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:05,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 15:45:05,908 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:05,909 INFO L82 PathProgramCache]: Analyzing trace with hash 133677644, now seen corresponding path program 13 times [2020-10-12 15:45:05,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:05,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935505341] [2020-10-12 15:45:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:05,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:05,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:07,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:07,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 15:45:07,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:07,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1357 [2020-10-12 15:45:07,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:07,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:45:07,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:45:07,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:45:07,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:08,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:08,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:08,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:08,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:08,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:08,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:08,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:08,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:08,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:08,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:08,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:45:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:08,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935505341] [2020-10-12 15:45:08,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:08,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:45:08,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667334406] [2020-10-12 15:45:08,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:45:08,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:08,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:45:08,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:45:08,198 INFO L87 Difference]: Start difference. First operand 181 states and 216 transitions. Second operand 19 states. [2020-10-12 15:45:09,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:09,726 INFO L93 Difference]: Finished difference Result 215 states and 253 transitions. [2020-10-12 15:45:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:45:09,729 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-10-12 15:45:09,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:09,731 INFO L225 Difference]: With dead ends: 215 [2020-10-12 15:45:09,731 INFO L226 Difference]: Without dead ends: 199 [2020-10-12 15:45:09,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:45:09,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-12 15:45:09,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 157. [2020-10-12 15:45:09,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-12 15:45:09,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 189 transitions. [2020-10-12 15:45:09,741 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 189 transitions. Word has length 51 [2020-10-12 15:45:09,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:09,742 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 189 transitions. [2020-10-12 15:45:09,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:45:09,742 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 189 transitions. [2020-10-12 15:45:09,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 15:45:09,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:09,743 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:09,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 15:45:09,743 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:09,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:09,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1587977140, now seen corresponding path program 4 times [2020-10-12 15:45:09,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:09,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749944916] [2020-10-12 15:45:09,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:09,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:09,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:09,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:10,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:10,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:10,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:10,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:11,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:12,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:13,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:14,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:14,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 15:45:14,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 15:45:14,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 15:45:14,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:14,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:45:14,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 15:45:14,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:45:14,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:15,345 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-10-12 15:45:15,752 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2020-10-12 15:45:16,212 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 78 [2020-10-12 15:45:16,706 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 93 [2020-10-12 15:45:17,166 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 112 [2020-10-12 15:45:17,761 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 101 [2020-10-12 15:45:17,967 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2020-10-12 15:45:18,138 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 42 [2020-10-12 15:45:18,283 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 41 [2020-10-12 15:45:18,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:18,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:18,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:18,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:18,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:18,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:18,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:18,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:18,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:18,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:18,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:18,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749944916] [2020-10-12 15:45:18,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:18,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:45:18,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72456167] [2020-10-12 15:45:18,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:45:18,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:18,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:45:18,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:45:18,619 INFO L87 Difference]: Start difference. First operand 157 states and 189 transitions. Second operand 19 states. [2020-10-12 15:45:19,477 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 51 [2020-10-12 15:45:19,880 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 110 [2020-10-12 15:45:20,447 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 140 [2020-10-12 15:45:20,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:20,957 INFO L93 Difference]: Finished difference Result 180 states and 213 transitions. [2020-10-12 15:45:20,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:45:20,957 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-10-12 15:45:20,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:20,959 INFO L225 Difference]: With dead ends: 180 [2020-10-12 15:45:20,959 INFO L226 Difference]: Without dead ends: 161 [2020-10-12 15:45:20,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:45:20,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-12 15:45:20,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2020-10-12 15:45:20,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-12 15:45:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 188 transitions. [2020-10-12 15:45:20,969 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 188 transitions. Word has length 51 [2020-10-12 15:45:20,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:20,969 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 188 transitions. [2020-10-12 15:45:20,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:45:20,969 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 188 transitions. [2020-10-12 15:45:20,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 15:45:20,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:20,970 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:20,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 15:45:20,970 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:20,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:20,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1177367933, now seen corresponding path program 14 times [2020-10-12 15:45:20,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:20,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862335332] [2020-10-12 15:45:20,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:20,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:21,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:21,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:21,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 15:45:21,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:21,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 905 [2020-10-12 15:45:21,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:21,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:45:21,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:45:21,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:45:21,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:45:22,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:22,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:22,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:22,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:22,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:22,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:22,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:22,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:22,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:22,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:22,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:22,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862335332] [2020-10-12 15:45:22,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:22,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:45:22,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649903099] [2020-10-12 15:45:22,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:45:22,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:22,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:45:22,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:45:22,891 INFO L87 Difference]: Start difference. First operand 157 states and 188 transitions. Second operand 20 states. [2020-10-12 15:45:24,105 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 72 [2020-10-12 15:45:24,432 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2020-10-12 15:45:25,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:25,013 INFO L93 Difference]: Finished difference Result 230 states and 270 transitions. [2020-10-12 15:45:25,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:45:25,016 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2020-10-12 15:45:25,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:25,017 INFO L225 Difference]: With dead ends: 230 [2020-10-12 15:45:25,017 INFO L226 Difference]: Without dead ends: 226 [2020-10-12 15:45:25,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 15:45:25,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-12 15:45:25,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 189. [2020-10-12 15:45:25,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-12 15:45:25,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 226 transitions. [2020-10-12 15:45:25,029 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 226 transitions. Word has length 51 [2020-10-12 15:45:25,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:25,029 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 226 transitions. [2020-10-12 15:45:25,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:45:25,030 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 226 transitions. [2020-10-12 15:45:25,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 15:45:25,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:25,031 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:25,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 15:45:25,031 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:25,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:25,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1171895540, now seen corresponding path program 4 times [2020-10-12 15:45:25,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:25,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735996889] [2020-10-12 15:45:25,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:25,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:25,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:25,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:25,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:25,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:28,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:28,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 15:45:28,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:45:28,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3109 [2020-10-12 15:45:28,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:28,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:45:28,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:45:28,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:45:28,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:28,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:28,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:28,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:28,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:28,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:28,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:28,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:28,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:28,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:28,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:28,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:28,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735996889] [2020-10-12 15:45:28,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:28,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:45:28,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095161964] [2020-10-12 15:45:28,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:45:28,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:28,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:45:28,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:45:28,988 INFO L87 Difference]: Start difference. First operand 189 states and 226 transitions. Second operand 19 states. [2020-10-12 15:45:30,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:30,453 INFO L93 Difference]: Finished difference Result 215 states and 254 transitions. [2020-10-12 15:45:30,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:45:30,454 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-10-12 15:45:30,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:30,455 INFO L225 Difference]: With dead ends: 215 [2020-10-12 15:45:30,456 INFO L226 Difference]: Without dead ends: 196 [2020-10-12 15:45:30,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:45:30,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-12 15:45:30,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 184. [2020-10-12 15:45:30,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-12 15:45:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 217 transitions. [2020-10-12 15:45:30,473 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 217 transitions. Word has length 51 [2020-10-12 15:45:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:30,474 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 217 transitions. [2020-10-12 15:45:30,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:45:30,474 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 217 transitions. [2020-10-12 15:45:30,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 15:45:30,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:30,475 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:30,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 15:45:30,475 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:30,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:30,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1223736957, now seen corresponding path program 5 times [2020-10-12 15:45:30,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:30,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658832274] [2020-10-12 15:45:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:30,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:30,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:31,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:31,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 15:45:31,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:31,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 823 [2020-10-12 15:45:31,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:31,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:45:31,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:45:31,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:45:31,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:32,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:32,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:32,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:32,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:32,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:32,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:32,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:32,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:32,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:32,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:32,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:32,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658832274] [2020-10-12 15:45:32,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:32,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:45:32,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856610527] [2020-10-12 15:45:32,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:45:32,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:32,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:45:32,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:45:32,147 INFO L87 Difference]: Start difference. First operand 184 states and 217 transitions. Second operand 20 states. [2020-10-12 15:45:33,121 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2020-10-12 15:45:33,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:33,504 INFO L93 Difference]: Finished difference Result 211 states and 247 transitions. [2020-10-12 15:45:33,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:45:33,504 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2020-10-12 15:45:33,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:33,505 INFO L225 Difference]: With dead ends: 211 [2020-10-12 15:45:33,506 INFO L226 Difference]: Without dead ends: 205 [2020-10-12 15:45:33,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:45:33,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-12 15:45:33,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 191. [2020-10-12 15:45:33,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-12 15:45:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 225 transitions. [2020-10-12 15:45:33,517 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 225 transitions. Word has length 51 [2020-10-12 15:45:33,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:33,518 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 225 transitions. [2020-10-12 15:45:33,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:45:33,518 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 225 transitions. [2020-10-12 15:45:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 15:45:33,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:33,519 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:33,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 15:45:33,519 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:33,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:33,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1922864984, now seen corresponding path program 15 times [2020-10-12 15:45:33,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:33,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668796042] [2020-10-12 15:45:33,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:33,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:33,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:34,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:34,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 15:45:34,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:34,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 808 [2020-10-12 15:45:34,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:34,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:45:34,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:45:34,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 15:45:34,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:35,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:35,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:35,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:35,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:35,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:35,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:35,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:35,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:35,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:35,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:35,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:35,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668796042] [2020-10-12 15:45:35,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:35,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:45:35,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626997425] [2020-10-12 15:45:35,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:45:35,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:35,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:45:35,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:45:35,502 INFO L87 Difference]: Start difference. First operand 191 states and 225 transitions. Second operand 21 states. [2020-10-12 15:45:36,756 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-12 15:45:37,650 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2020-10-12 15:45:38,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:38,475 INFO L93 Difference]: Finished difference Result 244 states and 283 transitions. [2020-10-12 15:45:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 15:45:38,476 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-12 15:45:38,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:38,478 INFO L225 Difference]: With dead ends: 244 [2020-10-12 15:45:38,479 INFO L226 Difference]: Without dead ends: 240 [2020-10-12 15:45:38,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 15:45:38,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-12 15:45:38,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 208. [2020-10-12 15:45:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-12 15:45:38,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 244 transitions. [2020-10-12 15:45:38,491 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 244 transitions. Word has length 53 [2020-10-12 15:45:38,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:38,491 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 244 transitions. [2020-10-12 15:45:38,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:45:38,491 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 244 transitions. [2020-10-12 15:45:38,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 15:45:38,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:38,492 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:38,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 15:45:38,492 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:38,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:38,492 INFO L82 PathProgramCache]: Analyzing trace with hash 732516632, now seen corresponding path program 4 times [2020-10-12 15:45:38,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:38,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540356963] [2020-10-12 15:45:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:38,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:38,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:39,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:39,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 15:45:39,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:39,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-10-12 15:45:39,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:39,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:45:39,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:45:39,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:45:39,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:40,015 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-12 15:45:40,234 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-12 15:45:40,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:40,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:40,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:40,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:40,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:40,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:40,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:40,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:40,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:40,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:40,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:40,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540356963] [2020-10-12 15:45:40,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:40,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:45:40,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865687542] [2020-10-12 15:45:40,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:45:40,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:40,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:45:40,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:45:40,899 INFO L87 Difference]: Start difference. First operand 208 states and 244 transitions. Second operand 21 states. [2020-10-12 15:45:41,963 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-10-12 15:45:42,147 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2020-10-12 15:45:42,502 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-10-12 15:45:43,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:43,262 INFO L93 Difference]: Finished difference Result 245 states and 285 transitions. [2020-10-12 15:45:43,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 15:45:43,263 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-12 15:45:43,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:43,265 INFO L225 Difference]: With dead ends: 245 [2020-10-12 15:45:43,266 INFO L226 Difference]: Without dead ends: 239 [2020-10-12 15:45:43,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 15:45:43,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-12 15:45:43,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 217. [2020-10-12 15:45:43,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-12 15:45:43,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 255 transitions. [2020-10-12 15:45:43,282 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 255 transitions. Word has length 53 [2020-10-12 15:45:43,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:43,282 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 255 transitions. [2020-10-12 15:45:43,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:45:43,282 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 255 transitions. [2020-10-12 15:45:43,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 15:45:43,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:43,283 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:43,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 15:45:43,284 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:43,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:43,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1085992563, now seen corresponding path program 16 times [2020-10-12 15:45:43,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:43,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314835251] [2020-10-12 15:45:43,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:43,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:43,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:44,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:44,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 15:45:44,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:44,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-10-12 15:45:44,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:44,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:45:44,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:45:44,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 15:45:44,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:44,583 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-12 15:45:44,894 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-12 15:45:45,054 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-12 15:45:45,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:45,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:45,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:45,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:45,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:45,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:45,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:45,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:45,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:45,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:45,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:45,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314835251] [2020-10-12 15:45:45,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:45,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:45:45,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111176600] [2020-10-12 15:45:45,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:45:45,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:45,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:45:45,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:45:45,709 INFO L87 Difference]: Start difference. First operand 217 states and 255 transitions. Second operand 22 states. [2020-10-12 15:45:47,089 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-12 15:45:47,469 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-12 15:45:48,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:48,556 INFO L93 Difference]: Finished difference Result 265 states and 307 transitions. [2020-10-12 15:45:48,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:45:48,556 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2020-10-12 15:45:48,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:48,558 INFO L225 Difference]: With dead ends: 265 [2020-10-12 15:45:48,559 INFO L226 Difference]: Without dead ends: 261 [2020-10-12 15:45:48,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:45:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-12 15:45:48,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 229. [2020-10-12 15:45:48,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-12 15:45:48,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 268 transitions. [2020-10-12 15:45:48,577 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 268 transitions. Word has length 55 [2020-10-12 15:45:48,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:48,578 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 268 transitions. [2020-10-12 15:45:48,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:45:48,578 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 268 transitions. [2020-10-12 15:45:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 15:45:48,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:48,579 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:48,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 15:45:48,579 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:48,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2129682852, now seen corresponding path program 17 times [2020-10-12 15:45:48,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:48,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585006891] [2020-10-12 15:45:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:48,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:48,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:49,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:49,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 15:45:49,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:49,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 826 [2020-10-12 15:45:49,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:49,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:45:49,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:45:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:45:49,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:49,713 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-12 15:45:50,022 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-12 15:45:50,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:50,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:50,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:50,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:50,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:50,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:50,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:50,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:50,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:50,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:50,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:45:50,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585006891] [2020-10-12 15:45:50,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:50,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:45:50,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076278136] [2020-10-12 15:45:50,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:45:50,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:50,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:45:50,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:45:50,487 INFO L87 Difference]: Start difference. First operand 229 states and 268 transitions. Second operand 21 states. [2020-10-12 15:45:51,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:51,759 INFO L93 Difference]: Finished difference Result 261 states and 304 transitions. [2020-10-12 15:45:51,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:45:51,760 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-10-12 15:45:51,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:51,762 INFO L225 Difference]: With dead ends: 261 [2020-10-12 15:45:51,762 INFO L226 Difference]: Without dead ends: 257 [2020-10-12 15:45:51,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:45:51,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-12 15:45:51,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 229. [2020-10-12 15:45:51,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-12 15:45:51,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 268 transitions. [2020-10-12 15:45:51,777 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 268 transitions. Word has length 55 [2020-10-12 15:45:51,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:51,777 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 268 transitions. [2020-10-12 15:45:51,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:45:51,777 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 268 transitions. [2020-10-12 15:45:51,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 15:45:51,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:51,778 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:51,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 15:45:51,778 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:51,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:51,778 INFO L82 PathProgramCache]: Analyzing trace with hash 10480334, now seen corresponding path program 18 times [2020-10-12 15:45:51,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:51,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974345709] [2020-10-12 15:45:51,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:51,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:51,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:52,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:52,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 15:45:52,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:45:52,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 780 [2020-10-12 15:45:52,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:52,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:45:52,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:45:52,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:45:52,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:53,245 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-12 15:45:53,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:45:53,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:53,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:53,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:45:53,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:45:53,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:45:53,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:45:53,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:45:53,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:45:53,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:45:53,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:45:53,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:45:53,896 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:45:53,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974345709] [2020-10-12 15:45:53,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:45:53,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:45:53,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803306391] [2020-10-12 15:45:53,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:45:53,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:45:53,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:45:53,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:45:53,898 INFO L87 Difference]: Start difference. First operand 229 states and 268 transitions. Second operand 22 states. [2020-10-12 15:45:54,845 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2020-10-12 15:45:55,240 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 69 [2020-10-12 15:45:56,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:45:56,159 INFO L93 Difference]: Finished difference Result 275 states and 318 transitions. [2020-10-12 15:45:56,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:45:56,159 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2020-10-12 15:45:56,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:45:56,161 INFO L225 Difference]: With dead ends: 275 [2020-10-12 15:45:56,162 INFO L226 Difference]: Without dead ends: 257 [2020-10-12 15:45:56,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:45:56,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-12 15:45:56,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 200. [2020-10-12 15:45:56,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-12 15:45:56,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 236 transitions. [2020-10-12 15:45:56,178 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 236 transitions. Word has length 57 [2020-10-12 15:45:56,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:45:56,178 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 236 transitions. [2020-10-12 15:45:56,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:45:56,179 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 236 transitions. [2020-10-12 15:45:56,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 15:45:56,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:45:56,180 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:45:56,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 15:45:56,180 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:45:56,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:45:56,180 INFO L82 PathProgramCache]: Analyzing trace with hash 87344846, now seen corresponding path program 5 times [2020-10-12 15:45:56,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:45:56,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920319516] [2020-10-12 15:45:56,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:45:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:45:56,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:56,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:56,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:56,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:56,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:57,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:57,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:57,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:58,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:45:58,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:00,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:01,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:01,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 15:46:01,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 15:46:01,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 15:46:01,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:01,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:46:01,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 15:46:01,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:46:01,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:01,780 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-12 15:46:01,967 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-12 15:46:02,811 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 88 [2020-10-12 15:46:03,663 WARN L193 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 87 [2020-10-12 15:46:04,730 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 151 DAG size of output: 119 [2020-10-12 15:46:06,233 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 219 DAG size of output: 111 [2020-10-12 15:46:06,959 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 125 [2020-10-12 15:46:07,513 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 81 [2020-10-12 15:46:07,784 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 70 [2020-10-12 15:46:07,939 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-12 15:46:08,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:08,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:08,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:08,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:08,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:08,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:08,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:08,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:08,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:08,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:08,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:08,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920319516] [2020-10-12 15:46:08,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:08,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:46:08,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524495830] [2020-10-12 15:46:08,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:46:08,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:08,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:46:08,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:46:08,632 INFO L87 Difference]: Start difference. First operand 200 states and 236 transitions. Second operand 22 states. [2020-10-12 15:46:09,659 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 40 [2020-10-12 15:46:10,056 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 85 [2020-10-12 15:46:10,859 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 148 [2020-10-12 15:46:12,159 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 232 DAG size of output: 177 [2020-10-12 15:46:12,834 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 176 [2020-10-12 15:46:13,106 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-12 15:46:13,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:13,785 INFO L93 Difference]: Finished difference Result 225 states and 262 transitions. [2020-10-12 15:46:13,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:46:13,786 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2020-10-12 15:46:13,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:13,787 INFO L225 Difference]: With dead ends: 225 [2020-10-12 15:46:13,788 INFO L226 Difference]: Without dead ends: 204 [2020-10-12 15:46:13,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:46:13,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-12 15:46:13,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2020-10-12 15:46:13,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-12 15:46:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 235 transitions. [2020-10-12 15:46:13,805 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 235 transitions. Word has length 57 [2020-10-12 15:46:13,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:13,805 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 235 transitions. [2020-10-12 15:46:13,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:46:13,805 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 235 transitions. [2020-10-12 15:46:13,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 15:46:13,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:13,806 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:13,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 15:46:13,806 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:13,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:13,807 INFO L82 PathProgramCache]: Analyzing trace with hash -2025499201, now seen corresponding path program 19 times [2020-10-12 15:46:13,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:13,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611407722] [2020-10-12 15:46:13,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:13,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:13,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:14,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:14,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 15:46:14,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:14,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-10-12 15:46:14,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:14,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 15:46:14,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:14,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 15:46:14,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:15,339 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-12 15:46:15,627 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-12 15:46:15,777 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-12 15:46:15,999 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-12 15:46:16,154 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-12 15:46:16,336 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-12 15:46:16,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:16,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:16,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:16,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:16,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:16,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:16,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:16,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:16,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:16,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:16,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:16,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611407722] [2020-10-12 15:46:16,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:16,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:46:16,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091168985] [2020-10-12 15:46:16,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:46:16,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:16,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:46:16,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:46:16,773 INFO L87 Difference]: Start difference. First operand 200 states and 235 transitions. Second operand 23 states. [2020-10-12 15:46:18,248 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 77 [2020-10-12 15:46:18,497 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2020-10-12 15:46:18,728 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2020-10-12 15:46:19,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:19,449 INFO L93 Difference]: Finished difference Result 236 states and 274 transitions. [2020-10-12 15:46:19,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 15:46:19,450 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-10-12 15:46:19,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:19,452 INFO L225 Difference]: With dead ends: 236 [2020-10-12 15:46:19,452 INFO L226 Difference]: Without dead ends: 232 [2020-10-12 15:46:19,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 15:46:19,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-12 15:46:19,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 219. [2020-10-12 15:46:19,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-12 15:46:19,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 257 transitions. [2020-10-12 15:46:19,468 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 257 transitions. Word has length 57 [2020-10-12 15:46:19,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:19,468 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 257 transitions. [2020-10-12 15:46:19,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:46:19,468 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 257 transitions. [2020-10-12 15:46:19,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 15:46:19,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:19,469 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:19,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 15:46:19,470 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:19,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:19,470 INFO L82 PathProgramCache]: Analyzing trace with hash -622223986, now seen corresponding path program 6 times [2020-10-12 15:46:19,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:19,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326095450] [2020-10-12 15:46:19,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:19,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:19,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:19,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:19,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:20,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:20,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:24,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:24,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 15:46:24,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:46:24,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 15:46:24,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:24,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:46:24,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:24,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 15:46:24,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:25,220 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-12 15:46:25,361 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-12 15:46:25,497 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-12 15:46:25,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:25,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:25,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:25,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:25,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:25,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:25,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:25,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:25,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:25,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:25,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:25,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326095450] [2020-10-12 15:46:25,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:25,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:46:25,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106467973] [2020-10-12 15:46:25,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:46:25,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:25,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:46:25,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:46:25,996 INFO L87 Difference]: Start difference. First operand 219 states and 257 transitions. Second operand 22 states. [2020-10-12 15:46:27,030 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2020-10-12 15:46:27,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:27,799 INFO L93 Difference]: Finished difference Result 249 states and 288 transitions. [2020-10-12 15:46:27,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:46:27,800 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2020-10-12 15:46:27,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:27,801 INFO L225 Difference]: With dead ends: 249 [2020-10-12 15:46:27,802 INFO L226 Difference]: Without dead ends: 228 [2020-10-12 15:46:27,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:46:27,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-12 15:46:27,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 214. [2020-10-12 15:46:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-12 15:46:27,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 247 transitions. [2020-10-12 15:46:27,815 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 247 transitions. Word has length 57 [2020-10-12 15:46:27,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:27,815 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 247 transitions. [2020-10-12 15:46:27,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:46:27,815 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 247 transitions. [2020-10-12 15:46:27,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 15:46:27,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:27,816 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:27,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 15:46:27,816 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:27,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:27,816 INFO L82 PathProgramCache]: Analyzing trace with hash -99405953, now seen corresponding path program 7 times [2020-10-12 15:46:27,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:27,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373667510] [2020-10-12 15:46:27,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:27,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:27,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:28,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:28,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 15:46:28,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:28,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 947 [2020-10-12 15:46:28,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:28,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 15:46:28,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:28,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:46:28,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:29,432 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-10-12 15:46:29,638 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-12 15:46:30,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:30,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:30,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:30,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:30,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:30,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:30,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:30,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:30,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:30,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:30,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:30,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373667510] [2020-10-12 15:46:30,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:30,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:46:30,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344864203] [2020-10-12 15:46:30,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:46:30,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:30,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:46:30,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:46:30,180 INFO L87 Difference]: Start difference. First operand 214 states and 247 transitions. Second operand 23 states. [2020-10-12 15:46:31,244 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-10-12 15:46:31,422 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2020-10-12 15:46:31,779 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-12 15:46:32,024 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-10-12 15:46:32,281 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2020-10-12 15:46:32,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:32,876 INFO L93 Difference]: Finished difference Result 222 states and 256 transitions. [2020-10-12 15:46:32,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 15:46:32,876 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-10-12 15:46:32,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:32,878 INFO L225 Difference]: With dead ends: 222 [2020-10-12 15:46:32,878 INFO L226 Difference]: Without dead ends: 216 [2020-10-12 15:46:32,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:46:32,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-12 15:46:32,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-10-12 15:46:32,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-12 15:46:32,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 249 transitions. [2020-10-12 15:46:32,903 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 249 transitions. Word has length 57 [2020-10-12 15:46:32,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:32,904 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 249 transitions. [2020-10-12 15:46:32,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:46:32,904 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 249 transitions. [2020-10-12 15:46:32,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 15:46:32,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:32,905 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:32,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 15:46:32,906 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:32,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:32,906 INFO L82 PathProgramCache]: Analyzing trace with hash -835866854, now seen corresponding path program 20 times [2020-10-12 15:46:32,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:32,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632617672] [2020-10-12 15:46:32,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:32,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:33,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:34,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:34,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 15:46:34,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:34,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1160 [2020-10-12 15:46:34,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:34,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 15:46:34,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:34,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 15:46:34,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:34,542 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-12 15:46:34,743 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-10-12 15:46:34,969 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-12 15:46:35,123 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-12 15:46:35,310 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-12 15:46:35,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:35,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:35,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:35,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:35,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:35,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:35,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:35,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:35,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:35,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:35,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:35,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632617672] [2020-10-12 15:46:35,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:35,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:46:35,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467605681] [2020-10-12 15:46:35,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:46:35,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:35,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:46:35,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:46:35,885 INFO L87 Difference]: Start difference. First operand 216 states and 249 transitions. Second operand 24 states. [2020-10-12 15:46:37,085 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-12 15:46:37,293 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-12 15:46:37,672 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-12 15:46:37,908 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 15:46:38,082 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-12 15:46:38,415 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 88 [2020-10-12 15:46:39,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:39,444 INFO L93 Difference]: Finished difference Result 318 states and 363 transitions. [2020-10-12 15:46:39,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 15:46:39,445 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2020-10-12 15:46:39,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:39,447 INFO L225 Difference]: With dead ends: 318 [2020-10-12 15:46:39,447 INFO L226 Difference]: Without dead ends: 314 [2020-10-12 15:46:39,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=164, Invalid=1642, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 15:46:39,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-12 15:46:39,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 260. [2020-10-12 15:46:39,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-12 15:46:39,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 300 transitions. [2020-10-12 15:46:39,470 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 300 transitions. Word has length 59 [2020-10-12 15:46:39,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:39,471 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 300 transitions. [2020-10-12 15:46:39,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:46:39,471 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 300 transitions. [2020-10-12 15:46:39,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 15:46:39,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:39,472 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:39,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 15:46:39,472 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:39,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:39,473 INFO L82 PathProgramCache]: Analyzing trace with hash -270476902, now seen corresponding path program 5 times [2020-10-12 15:46:39,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:39,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465082234] [2020-10-12 15:46:39,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:39,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:39,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:40,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:40,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 15:46:40,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:40,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-10-12 15:46:40,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:40,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 15:46:40,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:40,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 15:46:40,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:41,147 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-12 15:46:41,388 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-12 15:46:42,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:42,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:42,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:42,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:42,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:42,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:42,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:42,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:42,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:42,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:42,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:42,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465082234] [2020-10-12 15:46:42,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:42,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:46:42,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683309790] [2020-10-12 15:46:42,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:46:42,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:42,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:46:42,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:46:42,062 INFO L87 Difference]: Start difference. First operand 260 states and 300 transitions. Second operand 24 states. [2020-10-12 15:46:43,471 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 72 [2020-10-12 15:46:43,711 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 68 [2020-10-12 15:46:44,190 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 94 [2020-10-12 15:46:45,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:45,088 INFO L93 Difference]: Finished difference Result 301 states and 345 transitions. [2020-10-12 15:46:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 15:46:45,089 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2020-10-12 15:46:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:45,091 INFO L225 Difference]: With dead ends: 301 [2020-10-12 15:46:45,091 INFO L226 Difference]: Without dead ends: 295 [2020-10-12 15:46:45,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 15:46:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-12 15:46:45,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 269. [2020-10-12 15:46:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-12 15:46:45,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 311 transitions. [2020-10-12 15:46:45,113 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 311 transitions. Word has length 59 [2020-10-12 15:46:45,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:45,113 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 311 transitions. [2020-10-12 15:46:45,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:46:45,114 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 311 transitions. [2020-10-12 15:46:45,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 15:46:45,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:45,114 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:45,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 15:46:45,114 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:45,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:45,115 INFO L82 PathProgramCache]: Analyzing trace with hash -60482123, now seen corresponding path program 21 times [2020-10-12 15:46:45,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:45,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921844423] [2020-10-12 15:46:45,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:45,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:45,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:46,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:46,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 15:46:46,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:46,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1066 [2020-10-12 15:46:46,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:46,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 15:46:46,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:46,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 15:46:46,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:46,551 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-12 15:46:46,885 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-12 15:46:47,141 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-12 15:46:47,329 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2020-10-12 15:46:47,511 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-12 15:46:48,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:48,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:48,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:48,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:48,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:48,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:48,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:48,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:48,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:48,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:48,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:48,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921844423] [2020-10-12 15:46:48,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:48,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:46:48,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696582927] [2020-10-12 15:46:48,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:46:48,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:48,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:46:48,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:46:48,228 INFO L87 Difference]: Start difference. First operand 269 states and 311 transitions. Second operand 25 states. [2020-10-12 15:46:49,673 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-12 15:46:50,131 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-12 15:46:50,358 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-12 15:46:50,668 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-12 15:46:51,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:51,880 INFO L93 Difference]: Finished difference Result 341 states and 389 transitions. [2020-10-12 15:46:51,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:46:51,881 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 61 [2020-10-12 15:46:51,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:51,883 INFO L225 Difference]: With dead ends: 341 [2020-10-12 15:46:51,883 INFO L226 Difference]: Without dead ends: 337 [2020-10-12 15:46:51,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 15:46:51,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-12 15:46:51,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 283. [2020-10-12 15:46:51,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-12 15:46:51,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 326 transitions. [2020-10-12 15:46:51,908 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 326 transitions. Word has length 61 [2020-10-12 15:46:51,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:51,908 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 326 transitions. [2020-10-12 15:46:51,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:46:51,908 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 326 transitions. [2020-10-12 15:46:51,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 15:46:51,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:51,909 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:51,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 15:46:51,909 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:51,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:51,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2054902160, now seen corresponding path program 22 times [2020-10-12 15:46:51,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:51,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877573298] [2020-10-12 15:46:51,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:51,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:52,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:53,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:53,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 15:46:53,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:53,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1162 [2020-10-12 15:46:53,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:53,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 15:46:53,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:46:53,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 15:46:53,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:53,546 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-12 15:46:53,744 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-12 15:46:54,127 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 73 [2020-10-12 15:46:54,261 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-12 15:46:54,396 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-12 15:46:54,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:54,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:54,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:54,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:54,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:54,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:54,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:54,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:54,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:54,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:54,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:55,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877573298] [2020-10-12 15:46:55,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:55,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:46:55,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614798243] [2020-10-12 15:46:55,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:46:55,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:55,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:46:55,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:46:55,018 INFO L87 Difference]: Start difference. First operand 283 states and 326 transitions. Second operand 25 states. [2020-10-12 15:46:56,249 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 73 [2020-10-12 15:46:56,726 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-12 15:46:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:57,972 INFO L93 Difference]: Finished difference Result 343 states and 391 transitions. [2020-10-12 15:46:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:46:57,973 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2020-10-12 15:46:57,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:57,975 INFO L225 Difference]: With dead ends: 343 [2020-10-12 15:46:57,975 INFO L226 Difference]: Without dead ends: 323 [2020-10-12 15:46:57,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 15:46:57,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-12 15:46:57,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 249. [2020-10-12 15:46:57,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-12 15:46:57,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 289 transitions. [2020-10-12 15:46:57,999 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 289 transitions. Word has length 63 [2020-10-12 15:46:57,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:57,999 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 289 transitions. [2020-10-12 15:46:57,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:46:57,999 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 289 transitions. [2020-10-12 15:46:58,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 15:46:58,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:58,001 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:58,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 15:46:58,001 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:58,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:58,001 INFO L82 PathProgramCache]: Analyzing trace with hash -363010160, now seen corresponding path program 6 times [2020-10-12 15:46:58,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:58,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385951625] [2020-10-12 15:46:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:58,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:58,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:58,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:58,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:59,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:00,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:00,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:00,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:00,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:01,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:02,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:03,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:03,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 15:47:03,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 15:47:03,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 15:47:03,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:03,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 15:47:03,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:47:03,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 15:47:03,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:03,680 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-12 15:47:03,970 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-10-12 15:47:04,107 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-12 15:47:04,248 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-12 15:47:04,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:04,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:04,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:04,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:04,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:04,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:04,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:04,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:04,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:04,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:04,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:04,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385951625] [2020-10-12 15:47:04,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:04,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:47:04,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730249593] [2020-10-12 15:47:04,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:47:04,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:04,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:47:04,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:47:04,933 INFO L87 Difference]: Start difference. First operand 249 states and 289 transitions. Second operand 25 states. [2020-10-12 15:47:06,217 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-12 15:47:06,679 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-12 15:47:06,891 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 15:47:07,188 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-12 15:47:08,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:08,158 INFO L93 Difference]: Finished difference Result 281 states and 322 transitions. [2020-10-12 15:47:08,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:47:08,158 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2020-10-12 15:47:08,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:08,160 INFO L225 Difference]: With dead ends: 281 [2020-10-12 15:47:08,160 INFO L226 Difference]: Without dead ends: 258 [2020-10-12 15:47:08,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 15:47:08,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-12 15:47:08,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 244. [2020-10-12 15:47:08,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-12 15:47:08,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 278 transitions. [2020-10-12 15:47:08,183 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 278 transitions. Word has length 63 [2020-10-12 15:47:08,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:08,184 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 278 transitions. [2020-10-12 15:47:08,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:47:08,184 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 278 transitions. [2020-10-12 15:47:08,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 15:47:08,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:08,185 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:08,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 15:47:08,185 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:08,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:08,186 INFO L82 PathProgramCache]: Analyzing trace with hash -311311295, now seen corresponding path program 23 times [2020-10-12 15:47:08,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:08,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277597437] [2020-10-12 15:47:08,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:08,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:08,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:09,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:09,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 15:47:09,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:47:09,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1212 [2020-10-12 15:47:09,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:09,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 15:47:09,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:47:09,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 15:47:09,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:09,847 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-12 15:47:10,045 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-12 15:47:10,332 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2020-10-12 15:47:10,618 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-12 15:47:10,778 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2020-10-12 15:47:10,945 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-10-12 15:47:11,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:11,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:11,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:11,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:11,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:11,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:11,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:11,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:11,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:11,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:11,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:11,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277597437] [2020-10-12 15:47:11,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:11,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 15:47:11,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318489184] [2020-10-12 15:47:11,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 15:47:11,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:11,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 15:47:11,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:47:11,592 INFO L87 Difference]: Start difference. First operand 244 states and 278 transitions. Second operand 26 states. [2020-10-12 15:47:13,296 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-12 15:47:13,500 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 15:47:13,872 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 15:47:14,088 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-12 15:47:14,650 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 100 [2020-10-12 15:47:14,970 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 93 [2020-10-12 15:47:15,269 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 95 [2020-10-12 15:47:16,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:16,327 INFO L93 Difference]: Finished difference Result 346 states and 392 transitions. [2020-10-12 15:47:16,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 15:47:16,327 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2020-10-12 15:47:16,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:16,330 INFO L225 Difference]: With dead ends: 346 [2020-10-12 15:47:16,330 INFO L226 Difference]: Without dead ends: 342 [2020-10-12 15:47:16,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=208, Invalid=2342, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 15:47:16,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-12 15:47:16,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 290. [2020-10-12 15:47:16,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-12 15:47:16,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 331 transitions. [2020-10-12 15:47:16,354 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 331 transitions. Word has length 63 [2020-10-12 15:47:16,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:16,354 INFO L479 AbstractCegarLoop]: Abstraction has 290 states and 331 transitions. [2020-10-12 15:47:16,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 15:47:16,354 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 331 transitions. [2020-10-12 15:47:16,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 15:47:16,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:16,355 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:16,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 15:47:16,355 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:16,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:16,356 INFO L82 PathProgramCache]: Analyzing trace with hash 36482753, now seen corresponding path program 8 times [2020-10-12 15:47:16,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:16,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186528088] [2020-10-12 15:47:16,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:16,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:16,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:17,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:17,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 15:47:17,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:47:17,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1432 [2020-10-12 15:47:17,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:17,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 15:47:17,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:47:17,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 15:47:17,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:18,421 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-12 15:47:18,629 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-10-12 15:47:18,909 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-12 15:47:19,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:19,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:19,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:19,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:19,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:19,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:19,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:19,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:19,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:19,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:19,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:19,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186528088] [2020-10-12 15:47:19,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:19,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 15:47:19,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856680105] [2020-10-12 15:47:19,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 15:47:19,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:19,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 15:47:19,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:47:19,578 INFO L87 Difference]: Start difference. First operand 290 states and 331 transitions. Second operand 26 states. [2020-10-12 15:47:21,374 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 91 [2020-10-12 15:47:21,682 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 94 [2020-10-12 15:47:22,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:22,400 INFO L93 Difference]: Finished difference Result 325 states and 369 transitions. [2020-10-12 15:47:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 15:47:22,401 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2020-10-12 15:47:22,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:22,404 INFO L225 Difference]: With dead ends: 325 [2020-10-12 15:47:22,404 INFO L226 Difference]: Without dead ends: 319 [2020-10-12 15:47:22,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=153, Invalid=1407, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 15:47:22,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-10-12 15:47:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 297. [2020-10-12 15:47:22,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-12 15:47:22,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 339 transitions. [2020-10-12 15:47:22,435 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 339 transitions. Word has length 63 [2020-10-12 15:47:22,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:22,435 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 339 transitions. [2020-10-12 15:47:22,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 15:47:22,436 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 339 transitions. [2020-10-12 15:47:22,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 15:47:22,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:22,437 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:22,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 15:47:22,437 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:22,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:22,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1526236444, now seen corresponding path program 24 times [2020-10-12 15:47:22,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:22,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423450770] [2020-10-12 15:47:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:22,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:22,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:23,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:23,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 15:47:23,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:47:23,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1407 [2020-10-12 15:47:23,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:23,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 15:47:23,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:47:23,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 15:47:23,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:24,437 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-12 15:47:24,569 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-12 15:47:24,781 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-10-12 15:47:25,115 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-10-12 15:47:25,276 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-12 15:47:25,468 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-12 15:47:26,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:26,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:26,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:26,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:26,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:26,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:26,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:26,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:26,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:26,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:26,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:26,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423450770] [2020-10-12 15:47:26,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:26,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 15:47:26,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866744660] [2020-10-12 15:47:26,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 15:47:26,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:26,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 15:47:26,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:47:26,175 INFO L87 Difference]: Start difference. First operand 297 states and 339 transitions. Second operand 27 states. [2020-10-12 15:47:27,781 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-12 15:47:27,984 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 15:47:28,403 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-12 15:47:28,657 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 15:47:28,832 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 15:47:29,122 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 15:47:29,374 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-12 15:47:29,565 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-12 15:47:29,984 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 109 [2020-10-12 15:47:31,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:31,203 INFO L93 Difference]: Finished difference Result 380 states and 429 transitions. [2020-10-12 15:47:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 15:47:31,203 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 65 [2020-10-12 15:47:31,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:31,206 INFO L225 Difference]: With dead ends: 380 [2020-10-12 15:47:31,206 INFO L226 Difference]: Without dead ends: 376 [2020-10-12 15:47:31,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=204, Invalid=2448, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 15:47:31,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-12 15:47:31,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 318. [2020-10-12 15:47:31,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-12 15:47:31,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 362 transitions. [2020-10-12 15:47:31,246 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 362 transitions. Word has length 65 [2020-10-12 15:47:31,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:31,246 INFO L479 AbstractCegarLoop]: Abstraction has 318 states and 362 transitions. [2020-10-12 15:47:31,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 15:47:31,246 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 362 transitions. [2020-10-12 15:47:31,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 15:47:31,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:31,248 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:31,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 15:47:31,249 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:31,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:31,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1668341852, now seen corresponding path program 6 times [2020-10-12 15:47:31,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:31,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916658271] [2020-10-12 15:47:31,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:31,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:31,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:32,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:32,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 15:47:32,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:47:32,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1621 [2020-10-12 15:47:32,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:32,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 15:47:32,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:47:32,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 15:47:32,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:33,512 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-12 15:47:33,857 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-12 15:47:34,009 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-12 15:47:34,305 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2020-10-12 15:47:34,522 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2020-10-12 15:47:34,730 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2020-10-12 15:47:35,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:35,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:35,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:35,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:35,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:35,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 15:47:35,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:35,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:35,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:35,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:35,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:35,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916658271] [2020-10-12 15:47:35,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:35,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 15:47:35,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108158571] [2020-10-12 15:47:35,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 15:47:35,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:35,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 15:47:35,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:47:35,380 INFO L87 Difference]: Start difference. First operand 318 states and 362 transitions. Second operand 27 states. [2020-10-12 15:47:37,432 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 91 [2020-10-12 15:47:38,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:38,558 INFO L93 Difference]: Finished difference Result 363 states and 411 transitions. [2020-10-12 15:47:38,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 15:47:38,559 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 65 [2020-10-12 15:47:38,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:38,562 INFO L225 Difference]: With dead ends: 363 [2020-10-12 15:47:38,562 INFO L226 Difference]: Without dead ends: 357 [2020-10-12 15:47:38,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=166, Invalid=1726, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 15:47:38,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-12 15:47:38,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 327. [2020-10-12 15:47:38,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-12 15:47:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 373 transitions. [2020-10-12 15:47:38,601 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 373 transitions. Word has length 65 [2020-10-12 15:47:38,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:38,601 INFO L479 AbstractCegarLoop]: Abstraction has 327 states and 373 transitions. [2020-10-12 15:47:38,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 15:47:38,601 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 373 transitions. [2020-10-12 15:47:38,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 15:47:38,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:38,603 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:38,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 15:47:38,603 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:38,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:38,603 INFO L82 PathProgramCache]: Analyzing trace with hash -2116912329, now seen corresponding path program 25 times [2020-10-12 15:47:38,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:38,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612362056] [2020-10-12 15:47:38,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:38,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:38,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:39,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:39,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 15:47:39,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:47:39,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1368 [2020-10-12 15:47:39,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:39,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:47:39,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:47:39,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 15:47:39,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:40,783 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-12 15:47:41,096 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-10-12 15:47:41,256 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-12 15:47:41,512 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2020-10-12 15:47:41,706 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-12 15:47:41,895 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-10-12 15:47:42,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:42,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:42,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:42,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:42,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:42,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:42,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:42,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:42,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:42,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:42,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:42,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612362056] [2020-10-12 15:47:42,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:42,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 15:47:42,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169348263] [2020-10-12 15:47:42,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 15:47:42,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:42,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 15:47:42,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=700, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:47:42,867 INFO L87 Difference]: Start difference. First operand 327 states and 373 transitions. Second operand 28 states. [2020-10-12 15:47:44,873 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2020-10-12 15:47:45,456 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2020-10-12 15:47:45,723 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-12 15:47:46,133 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 90 [2020-10-12 15:47:46,435 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-12 15:47:46,827 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 94 [2020-10-12 15:47:48,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:48,723 INFO L93 Difference]: Finished difference Result 405 states and 457 transitions. [2020-10-12 15:47:48,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 15:47:48,724 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 67 [2020-10-12 15:47:48,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:48,726 INFO L225 Difference]: With dead ends: 405 [2020-10-12 15:47:48,726 INFO L226 Difference]: Without dead ends: 401 [2020-10-12 15:47:48,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=159, Invalid=2291, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 15:47:48,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-10-12 15:47:48,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 343. [2020-10-12 15:47:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-12 15:47:48,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 390 transitions. [2020-10-12 15:47:48,762 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 390 transitions. Word has length 67 [2020-10-12 15:47:48,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:48,763 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 390 transitions. [2020-10-12 15:47:48,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 15:47:48,763 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 390 transitions. [2020-10-12 15:47:48,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 15:47:48,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:48,764 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:48,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 15:47:48,764 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:48,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:48,765 INFO L82 PathProgramCache]: Analyzing trace with hash -188158488, now seen corresponding path program 26 times [2020-10-12 15:47:48,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:48,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40436088] [2020-10-12 15:47:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:48,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:48,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:50,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:50,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 15:47:50,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:47:50,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1493 [2020-10-12 15:47:50,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:50,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:47:50,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:47:50,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 15:47:50,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:50,667 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-12 15:47:50,867 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-12 15:47:51,125 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-12 15:47:51,461 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-10-12 15:47:51,611 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-12 15:47:51,841 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-12 15:47:52,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:52,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:52,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:52,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:52,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:52,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:52,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:52,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:52,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:52,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:52,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:47:52,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40436088] [2020-10-12 15:47:52,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:52,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 15:47:52,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239743199] [2020-10-12 15:47:52,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 15:47:52,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:52,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 15:47:52,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:47:52,873 INFO L87 Difference]: Start difference. First operand 343 states and 390 transitions. Second operand 27 states. [2020-10-12 15:47:54,478 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-12 15:47:54,856 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2020-10-12 15:47:55,107 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 68 [2020-10-12 15:47:55,560 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-12 15:47:55,792 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-10-12 15:47:55,980 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 15:47:56,378 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-12 15:47:56,709 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-12 15:47:57,009 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-12 15:47:58,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:58,039 INFO L93 Difference]: Finished difference Result 401 states and 454 transitions. [2020-10-12 15:47:58,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 15:47:58,039 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 67 [2020-10-12 15:47:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:58,042 INFO L225 Difference]: With dead ends: 401 [2020-10-12 15:47:58,042 INFO L226 Difference]: Without dead ends: 397 [2020-10-12 15:47:58,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=205, Invalid=2345, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 15:47:58,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-12 15:47:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 343. [2020-10-12 15:47:58,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-12 15:47:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 390 transitions. [2020-10-12 15:47:58,083 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 390 transitions. Word has length 67 [2020-10-12 15:47:58,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:58,084 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 390 transitions. [2020-10-12 15:47:58,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 15:47:58,084 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 390 transitions. [2020-10-12 15:47:58,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 15:47:58,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:58,085 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:58,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 15:47:58,086 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:58,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:58,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1510430354, now seen corresponding path program 27 times [2020-10-12 15:47:58,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:58,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411515261] [2020-10-12 15:47:58,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:58,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:58,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking...