/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/relax-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:22:49,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:22:49,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:22:49,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:22:49,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:22:49,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:22:49,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:22:49,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:22:49,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:22:49,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:22:49,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:22:49,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:22:49,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:22:49,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:22:49,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:22:49,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:22:49,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:22:49,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:22:49,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:22:49,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:22:49,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:22:49,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:22:49,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:22:49,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:22:49,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:22:49,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:22:49,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:22:49,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:22:49,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:22:49,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:22:49,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:22:49,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:22:49,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:22:49,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:22:49,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:22:49,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:22:49,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:22:49,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:22:49,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:22:49,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:22:49,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:22:49,222 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 [2020-10-13 23:22:49,264 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:22:49,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:22:49,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:22:49,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:22:49,267 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:22:49,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:22:49,268 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:22:49,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:22:49,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:22:49,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:22:49,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:22:49,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:22:49,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:22:49,270 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:22:49,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:22:49,271 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:22:49,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:22:49,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:22:49,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:22:49,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:22:49,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:22:49,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:22:49,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:22:49,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:22:49,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:22:49,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:22:49,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:22:49,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:22:49,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:22:49,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:22:49,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:22:49,651 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:22:49,655 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:22:49,656 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:22:49,657 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:22:49,658 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/relax-2.i [2020-10-13 23:22:49,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94e530117/32410be427f54053b847eefcd4837da1/FLAG8cd3ed6c7 [2020-10-13 23:22:50,299 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:22:50,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/relax-2.i [2020-10-13 23:22:50,315 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94e530117/32410be427f54053b847eefcd4837da1/FLAG8cd3ed6c7 [2020-10-13 23:22:50,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94e530117/32410be427f54053b847eefcd4837da1 [2020-10-13 23:22:50,565 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:22:50,567 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:22:50,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:22:50,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:22:50,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:22:50,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:22:50" (1/1) ... [2020-10-13 23:22:50,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e1c3645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:50, skipping insertion in model container [2020-10-13 23:22:50,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:22:50" (1/1) ... [2020-10-13 23:22:50,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:22:50,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:22:51,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:22:51,098 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:22:51,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:22:51,230 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:22:51,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:51 WrapperNode [2020-10-13 23:22:51,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:22:51,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:22:51,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:22:51,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:22:51,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:51" (1/1) ... [2020-10-13 23:22:51,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:51" (1/1) ... [2020-10-13 23:22:51,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:51" (1/1) ... [2020-10-13 23:22:51,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:51" (1/1) ... [2020-10-13 23:22:51,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:51" (1/1) ... [2020-10-13 23:22:51,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:51" (1/1) ... [2020-10-13 23:22:51,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:51" (1/1) ... [2020-10-13 23:22:51,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:22:51,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:22:51,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:22:51,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:22:51,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:51" (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 [2020-10-13 23:22:51,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:22:51,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:22:51,378 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:22:51,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:22:51,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-13 23:22:51,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-13 23:22:51,378 INFO L138 BoogieDeclarations]: Found implementation of procedure is_relaxed_prefix [2020-10-13 23:22:51,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:22:51,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-10-13 23:22:51,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:22:51,379 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:22:51,379 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:22:51,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:22:51,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:22:51,380 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-13 23:22:51,381 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-13 23:22:51,381 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-13 23:22:51,381 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-13 23:22:51,381 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-13 23:22:51,382 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-13 23:22:51,382 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-13 23:22:51,383 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-13 23:22:51,383 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-13 23:22:51,383 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-13 23:22:51,385 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-13 23:22:51,386 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-13 23:22:51,386 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-13 23:22:51,386 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-13 23:22:51,386 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-13 23:22:51,386 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-13 23:22:51,386 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-13 23:22:51,387 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-13 23:22:51,387 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-13 23:22:51,387 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-13 23:22:51,387 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-13 23:22:51,387 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-13 23:22:51,387 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-13 23:22:51,387 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-13 23:22:51,388 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-13 23:22:51,388 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-13 23:22:51,388 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-13 23:22:51,388 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-13 23:22:51,388 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-13 23:22:51,388 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-13 23:22:51,388 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-13 23:22:51,389 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-13 23:22:51,389 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-13 23:22:51,389 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-13 23:22:51,389 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-13 23:22:51,390 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-13 23:22:51,390 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-13 23:22:51,390 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-13 23:22:51,390 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-13 23:22:51,390 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-13 23:22:51,390 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-13 23:22:51,390 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-13 23:22:51,391 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-13 23:22:51,392 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-13 23:22:51,392 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-13 23:22:51,392 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-13 23:22:51,392 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-13 23:22:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-13 23:22:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-13 23:22:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-13 23:22:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-13 23:22:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-13 23:22:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 23:22:51,394 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-13 23:22:51,395 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-13 23:22:51,395 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-13 23:22:51,396 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-13 23:22:51,397 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-13 23:22:51,397 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-13 23:22:51,397 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-13 23:22:51,397 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-13 23:22:51,397 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-13 23:22:51,398 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 23:22:51,398 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-13 23:22:51,398 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-13 23:22:51,398 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-13 23:22:51,398 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-13 23:22:51,398 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-13 23:22:51,398 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-13 23:22:51,399 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-13 23:22:51,399 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-13 23:22:51,399 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-13 23:22:51,399 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-13 23:22:51,400 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-13 23:22:51,400 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-13 23:22:51,400 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-13 23:22:51,401 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-13 23:22:51,401 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-13 23:22:51,401 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-13 23:22:51,401 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-13 23:22:51,401 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-13 23:22:51,401 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-13 23:22:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-13 23:22:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-13 23:22:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-13 23:22:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-13 23:22:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-13 23:22:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-13 23:22:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-13 23:22:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-13 23:22:51,403 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-13 23:22:51,403 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-13 23:22:51,403 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-13 23:22:51,403 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-13 23:22:51,403 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-13 23:22:51,403 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-13 23:22:51,404 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-13 23:22:51,404 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-13 23:22:51,404 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-13 23:22:51,404 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-13 23:22:51,404 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-13 23:22:51,405 INFO L130 BoogieDeclarations]: Found specification of procedure is_relaxed_prefix [2020-10-13 23:22:51,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:22:51,405 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:22:51,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 23:22:51,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:22:51,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:22:51,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:22:51,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:22:52,009 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:22:52,009 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-13 23:22:52,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:22:52 BoogieIcfgContainer [2020-10-13 23:22:52,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:22:52,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:22:52,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:22:52,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:22:52,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:22:50" (1/3) ... [2020-10-13 23:22:52,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d8ba61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:22:52, skipping insertion in model container [2020-10-13 23:22:52,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:51" (2/3) ... [2020-10-13 23:22:52,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d8ba61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:22:52, skipping insertion in model container [2020-10-13 23:22:52,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:22:52" (3/3) ... [2020-10-13 23:22:52,022 INFO L109 eAbstractionObserver]: Analyzing ICFG relax-2.i [2020-10-13 23:22:52,034 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:22:52,041 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:22:52,052 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:22:52,073 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:22:52,073 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:22:52,073 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:22:52,073 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:22:52,074 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:22:52,074 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:22:52,074 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:22:52,074 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:22:52,092 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-10-13 23:22:52,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 23:22:52,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:52,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:52,100 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:52,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:52,105 INFO L82 PathProgramCache]: Analyzing trace with hash 15551313, now seen corresponding path program 1 times [2020-10-13 23:22:52,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:52,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549383626] [2020-10-13 23:22:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:52,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:52,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:52,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:52,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:52,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 23:22:52,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:22:52,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-13 23:22:52,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:52,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:52,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:52,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:22:52,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:52,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:22:52,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:52,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:52,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:52,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:52,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:52,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:22:52,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:52,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:52,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:52,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:52,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:52,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:52,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 23:22:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:52,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:52,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:52,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:22:52,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:52,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 23:22:52,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:52,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:52,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:52,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:22:52,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:52,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:22:52,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549383626] [2020-10-13 23:22:52,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:52,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:22:52,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685696119] [2020-10-13 23:22:52,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:22:52,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:52,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:22:52,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:22:52,923 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 3 states. [2020-10-13 23:22:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:53,146 INFO L93 Difference]: Finished difference Result 108 states and 164 transitions. [2020-10-13 23:22:53,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:22:53,150 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-13 23:22:53,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:53,163 INFO L225 Difference]: With dead ends: 108 [2020-10-13 23:22:53,164 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 23:22:53,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:22:53,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 23:22:53,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-13 23:22:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 23:22:53,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2020-10-13 23:22:53,263 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 19 [2020-10-13 23:22:53,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:53,264 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2020-10-13 23:22:53,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:22:53,264 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2020-10-13 23:22:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 23:22:53,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:53,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:53,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:22:53,266 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:53,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:53,268 INFO L82 PathProgramCache]: Analyzing trace with hash -327224379, now seen corresponding path program 1 times [2020-10-13 23:22:53,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:53,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627016270] [2020-10-13 23:22:53,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:53,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:53,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:53,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:54,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:54,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 23:22:54,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:22:54,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 901 [2020-10-13 23:22:54,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:54,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:54,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:22:54,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:22:54,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:22:54,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:54,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:54,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:54,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:54,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:54,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:54,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:22:54,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:54,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:54,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:54,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:54,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:54,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:54,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 23:22:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:54,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:54,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:54,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:22:54,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:54,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-13 23:22:54,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:54,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:54,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:22:54,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:54,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:22:54,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-10-13 23:22:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:22:54,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627016270] [2020-10-13 23:22:54,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:54,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:22:54,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393026256] [2020-10-13 23:22:54,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:22:54,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:54,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:22:54,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:22:54,381 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand 5 states. [2020-10-13 23:22:54,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:54,588 INFO L93 Difference]: Finished difference Result 81 states and 105 transitions. [2020-10-13 23:22:54,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:22:54,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-13 23:22:54,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:54,591 INFO L225 Difference]: With dead ends: 81 [2020-10-13 23:22:54,591 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 23:22:54,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:22:54,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 23:22:54,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-13 23:22:54,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 23:22:54,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2020-10-13 23:22:54,603 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 19 [2020-10-13 23:22:54,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:54,603 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2020-10-13 23:22:54,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:22:54,604 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2020-10-13 23:22:54,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 23:22:54,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:54,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:54,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:22:54,605 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:54,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:54,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1675761359, now seen corresponding path program 1 times [2020-10-13 23:22:54,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:54,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76715440] [2020-10-13 23:22:54,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:54,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:54,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:55,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:55,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 23:22:55,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:22:55,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-13 23:22:55,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:55,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:55,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:22:55,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:22:55,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:22:55,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:55,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:55,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:55,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:55,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:55,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:55,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:22:55,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:55,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:55,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:55,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:55,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:55,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:22:55,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 23:22:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:55,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:55,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:55,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 23:22:55,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:55,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-13 23:22:55,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:55,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:55,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:22:55,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:55,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:22:55,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:22:55,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76715440] [2020-10-13 23:22:55,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:55,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 23:22:55,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527731957] [2020-10-13 23:22:55,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:22:55,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:55,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:22:55,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:22:55,194 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand 7 states. [2020-10-13 23:22:55,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:55,614 INFO L93 Difference]: Finished difference Result 104 states and 137 transitions. [2020-10-13 23:22:55,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:22:55,614 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-13 23:22:55,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:55,616 INFO L225 Difference]: With dead ends: 104 [2020-10-13 23:22:55,616 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 23:22:55,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:22:55,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 23:22:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-10-13 23:22:55,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 23:22:55,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 86 transitions. [2020-10-13 23:22:55,631 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 86 transitions. Word has length 21 [2020-10-13 23:22:55,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:55,631 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 86 transitions. [2020-10-13 23:22:55,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:22:55,632 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 86 transitions. [2020-10-13 23:22:55,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:22:55,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:55,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:55,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:22:55,634 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:55,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:55,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1478058804, now seen corresponding path program 1 times [2020-10-13 23:22:55,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:55,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020733250] [2020-10-13 23:22:55,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:55,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:55,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:55,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:56,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:56,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 23:22:56,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:22:56,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 627 [2020-10-13 23:22:56,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:56,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:56,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:22:56,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:22:56,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:22:56,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:56,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:56,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:56,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:56,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:56,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:56,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:22:56,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:56,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:56,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:56,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:56,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:56,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:22:56,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 23:22:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:56,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:56,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:56,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:22:56,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:56,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 23:22:56,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:56,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:22:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 23:22:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:22:56,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:22:56,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020733250] [2020-10-13 23:22:56,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:56,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 23:22:56,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107493982] [2020-10-13 23:22:56,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:22:56,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:56,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:22:56,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:22:56,402 INFO L87 Difference]: Start difference. First operand 65 states and 86 transitions. Second operand 7 states. [2020-10-13 23:22:56,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:56,731 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2020-10-13 23:22:56,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:22:56,731 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-13 23:22:56,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:56,734 INFO L225 Difference]: With dead ends: 82 [2020-10-13 23:22:56,735 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 23:22:56,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:22:56,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 23:22:56,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2020-10-13 23:22:56,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 23:22:56,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2020-10-13 23:22:56,747 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 22 [2020-10-13 23:22:56,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:56,747 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2020-10-13 23:22:56,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:22:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2020-10-13 23:22:56,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:22:56,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:56,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:56,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:22:56,749 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:56,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:56,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1840857741, now seen corresponding path program 1 times [2020-10-13 23:22:56,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:56,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608914933] [2020-10-13 23:22:56,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:56,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:56,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:57,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:57,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 23:22:57,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:22:57,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 962 [2020-10-13 23:22:57,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:57,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:57,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:22:57,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:22:57,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:22:57,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:57,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:57,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:57,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:57,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:57,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:57,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:22:57,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:57,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:57,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:57,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:57,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:57,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:57,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 23:22:57,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:57,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:57,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:57,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 23:22:57,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:57,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-13 23:22:57,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:57,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:57,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:22:57,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:57,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:22:57,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:22:57,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608914933] [2020-10-13 23:22:57,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:22:57,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:22:57,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940104749] [2020-10-13 23:22:57,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:22:57,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:57,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:22:57,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:22:57,966 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand 10 states. [2020-10-13 23:22:58,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:58,840 INFO L93 Difference]: Finished difference Result 153 states and 215 transitions. [2020-10-13 23:22:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:22:58,842 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-13 23:22:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:58,844 INFO L225 Difference]: With dead ends: 153 [2020-10-13 23:22:58,845 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 23:22:58,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:22:58,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 23:22:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 80. [2020-10-13 23:22:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 23:22:58,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 108 transitions. [2020-10-13 23:22:58,877 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 108 transitions. Word has length 23 [2020-10-13 23:22:58,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:58,878 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 108 transitions. [2020-10-13 23:22:58,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:22:58,878 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 108 transitions. [2020-10-13 23:22:58,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 23:22:58,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:58,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:58,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:22:58,884 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:58,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:58,885 INFO L82 PathProgramCache]: Analyzing trace with hash -656885300, now seen corresponding path program 1 times [2020-10-13 23:22:58,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:58,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694274232] [2020-10-13 23:22:58,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:58,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:58,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:59,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:59,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:59,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 23:22:59,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:22:59,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 752 [2020-10-13 23:22:59,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:59,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:59,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:22:59,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 23:22:59,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:22:59,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:59,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:59,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:59,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:59,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:59,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:59,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:22:59,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:59,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:59,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:59,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:59,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:59,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:59,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 23:22:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:59,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:59,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:59,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:22:59,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:59,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 23:22:59,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:59,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:59,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:22:59,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:59,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:22:59,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:22:59,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694274232] [2020-10-13 23:22:59,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:59,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 23:22:59,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544478193] [2020-10-13 23:22:59,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:22:59,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:59,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:22:59,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:22:59,794 INFO L87 Difference]: Start difference. First operand 80 states and 108 transitions. Second operand 6 states. [2020-10-13 23:23:00,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:00,050 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2020-10-13 23:23:00,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:23:00,050 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-13 23:23:00,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:00,052 INFO L225 Difference]: With dead ends: 95 [2020-10-13 23:23:00,052 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 23:23:00,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:23:00,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 23:23:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-13 23:23:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 23:23:00,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 107 transitions. [2020-10-13 23:23:00,064 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 107 transitions. Word has length 24 [2020-10-13 23:23:00,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:00,064 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 107 transitions. [2020-10-13 23:23:00,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:23:00,064 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 107 transitions. [2020-10-13 23:23:00,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 23:23:00,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:00,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:00,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:23:00,068 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:00,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:00,069 INFO L82 PathProgramCache]: Analyzing trace with hash -510581374, now seen corresponding path program 1 times [2020-10-13 23:23:00,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:00,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399717023] [2020-10-13 23:23:00,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:00,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:00,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:00,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 23:23:00,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:00,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-13 23:23:00,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:00,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:00,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:23:00,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:23:00,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:23:00,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:00,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:00,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:00,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:00,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:00,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:00,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:00,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:00,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:00,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:00,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:00,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:00,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:00,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 23:23:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:00,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:00,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:00,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 23:23:00,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:00,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 23:23:00,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:00,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:00,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:23:00,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:00,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 23:23:00,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:23:00,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399717023] [2020-10-13 23:23:00,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:23:00,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:23:00,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375165656] [2020-10-13 23:23:00,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:23:00,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:00,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:23:00,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:23:00,280 INFO L87 Difference]: Start difference. First operand 80 states and 107 transitions. Second operand 5 states. [2020-10-13 23:23:00,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:00,455 INFO L93 Difference]: Finished difference Result 92 states and 121 transitions. [2020-10-13 23:23:00,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:23:00,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-13 23:23:00,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:00,457 INFO L225 Difference]: With dead ends: 92 [2020-10-13 23:23:00,457 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 23:23:00,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:23:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 23:23:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2020-10-13 23:23:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 23:23:00,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2020-10-13 23:23:00,471 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 24 [2020-10-13 23:23:00,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:00,473 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2020-10-13 23:23:00,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:23:00,474 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2020-10-13 23:23:00,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 23:23:00,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:00,475 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] [2020-10-13 23:23:00,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:23:00,475 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:00,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:00,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1584690891, now seen corresponding path program 2 times [2020-10-13 23:23:00,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:00,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597595904] [2020-10-13 23:23:00,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:00,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:00,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:00,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:01,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:01,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:02,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:02,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:23:02,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:23:02,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1848 [2020-10-13 23:23:02,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:02,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:02,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:23:02,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:02,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:23:02,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:02,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:02,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:02,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:02,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:02,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:02,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:23:02,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:02,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:02,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:02,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:02,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:02,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:02,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 23:23:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:02,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:02,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:02,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 23:23:02,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:02,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-13 23:23:02,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:02,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:02,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:23:02,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 23:23:02,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:23:02,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:23:02,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597595904] [2020-10-13 23:23:02,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:02,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:23:02,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990089576] [2020-10-13 23:23:02,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:23:02,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:02,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:23:02,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:23:02,657 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand 9 states. [2020-10-13 23:23:03,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:03,250 INFO L93 Difference]: Finished difference Result 139 states and 191 transitions. [2020-10-13 23:23:03,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:23:03,251 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-13 23:23:03,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:03,252 INFO L225 Difference]: With dead ends: 139 [2020-10-13 23:23:03,252 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 23:23:03,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:23:03,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 23:23:03,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 77. [2020-10-13 23:23:03,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 23:23:03,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 103 transitions. [2020-10-13 23:23:03,278 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 103 transitions. Word has length 25 [2020-10-13 23:23:03,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:03,278 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 103 transitions. [2020-10-13 23:23:03,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:23:03,278 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 103 transitions. [2020-10-13 23:23:03,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 23:23:03,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:03,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:03,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:23:03,282 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:03,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:03,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1278691701, now seen corresponding path program 1 times [2020-10-13 23:23:03,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:03,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935871985] [2020-10-13 23:23:03,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:03,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:03,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:03,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:05,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:05,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:23:05,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:05,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1876 [2020-10-13 23:23:05,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:05,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:05,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:23:05,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:23:05,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:23:05,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:05,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:05,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:05,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:05,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:05,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:05,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:05,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:05,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:05,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:05,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:05,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:05,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:05,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 23:23:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:05,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:05,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:05,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 23:23:05,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:05,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-13 23:23:05,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:05,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:23:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:23:05,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:23:05,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935871985] [2020-10-13 23:23:05,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:23:05,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 23:23:05,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009704943] [2020-10-13 23:23:05,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:23:05,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:05,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:23:05,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:23:05,353 INFO L87 Difference]: Start difference. First operand 77 states and 103 transitions. Second operand 8 states. [2020-10-13 23:23:05,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:05,734 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2020-10-13 23:23:05,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:23:05,735 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-13 23:23:05,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:05,737 INFO L225 Difference]: With dead ends: 83 [2020-10-13 23:23:05,737 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 23:23:05,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:23:05,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 23:23:05,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2020-10-13 23:23:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 23:23:05,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2020-10-13 23:23:05,754 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 25 [2020-10-13 23:23:05,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:05,755 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2020-10-13 23:23:05,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:23:05,755 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2020-10-13 23:23:05,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 23:23:05,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:05,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:05,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:23:05,757 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:05,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:05,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1933285185, now seen corresponding path program 1 times [2020-10-13 23:23:05,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:05,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024391220] [2020-10-13 23:23:05,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:05,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:05,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:05,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 23:23:05,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:05,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-13 23:23:05,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:05,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:05,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:23:05,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:23:05,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 23:23:05,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:05,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:05,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:05,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:05,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:05,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:05,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:05,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:05,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:05,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:05,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:05,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:05,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:05,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 23:23:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:05,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:05,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:05,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 23:23:05,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:05,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 23:23:05,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:05,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:05,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:23:05,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 23:23:05,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 23:23:05,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:05,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:23:05,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024391220] [2020-10-13 23:23:05,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:23:05,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:23:05,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204260660] [2020-10-13 23:23:05,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:23:05,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:05,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:23:05,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:23:05,888 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 4 states. [2020-10-13 23:23:06,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:06,047 INFO L93 Difference]: Finished difference Result 97 states and 126 transitions. [2020-10-13 23:23:06,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:23:06,048 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-13 23:23:06,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:06,049 INFO L225 Difference]: With dead ends: 97 [2020-10-13 23:23:06,049 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 23:23:06,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:23:06,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 23:23:06,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2020-10-13 23:23:06,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 23:23:06,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2020-10-13 23:23:06,071 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 26 [2020-10-13 23:23:06,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:06,072 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2020-10-13 23:23:06,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:23:06,072 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2020-10-13 23:23:06,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:23:06,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:06,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:06,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:23:06,075 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:06,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:06,075 INFO L82 PathProgramCache]: Analyzing trace with hash -844238351, now seen corresponding path program 1 times [2020-10-13 23:23:06,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:06,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088755660] [2020-10-13 23:23:06,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:06,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:06,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:06,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:06,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:08,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:08,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:23:08,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:23:08,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1956 [2020-10-13 23:23:08,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:08,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:08,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:23:08,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:23:08,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:23:08,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:08,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:08,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:08,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:08,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:08,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:08,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:08,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:08,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:08,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:08,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:08,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:08,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:08,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 23:23:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:08,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:08,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:08,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 23:23:08,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:08,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 23:23:08,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:08,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:08,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:23:08,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 23:23:08,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:23:08,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:23:08,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088755660] [2020-10-13 23:23:08,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:23:08,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:23:08,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986596215] [2020-10-13 23:23:08,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:23:08,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:08,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:23:08,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:23:08,121 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand 4 states. [2020-10-13 23:23:08,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:08,276 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2020-10-13 23:23:08,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:23:08,277 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-13 23:23:08,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:08,278 INFO L225 Difference]: With dead ends: 93 [2020-10-13 23:23:08,278 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 23:23:08,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:23:08,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 23:23:08,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-10-13 23:23:08,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:23:08,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2020-10-13 23:23:08,294 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 27 [2020-10-13 23:23:08,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:08,294 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2020-10-13 23:23:08,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:23:08,295 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2020-10-13 23:23:08,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:23:08,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:08,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:08,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:23:08,298 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:08,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:08,298 INFO L82 PathProgramCache]: Analyzing trace with hash 2034253194, now seen corresponding path program 1 times [2020-10-13 23:23:08,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:08,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904482089] [2020-10-13 23:23:08,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:08,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:08,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:08,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:08,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:10,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:10,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:23:10,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:23:10,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1802 [2020-10-13 23:23:10,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:10,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:10,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:23:10,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:10,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:23:10,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:10,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:10,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:10,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:10,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:10,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:10,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:23:10,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:10,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:10,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:10,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:10,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:10,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:10,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 23:23:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:10,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:10,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:10,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:10,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 23:23:10,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:23:10,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-13 23:23:10,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:10,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:10,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:23:10,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:10,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:23:10,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:23:10,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904482089] [2020-10-13 23:23:10,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:10,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:23:10,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558605053] [2020-10-13 23:23:10,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:23:10,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:10,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:23:10,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:23:10,379 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand 9 states. [2020-10-13 23:23:10,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:10,943 INFO L93 Difference]: Finished difference Result 144 states and 192 transitions. [2020-10-13 23:23:10,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:23:10,944 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-13 23:23:10,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:10,945 INFO L225 Difference]: With dead ends: 144 [2020-10-13 23:23:10,945 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 23:23:10,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:23:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 23:23:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 88. [2020-10-13 23:23:10,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 23:23:10,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 116 transitions. [2020-10-13 23:23:10,967 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 116 transitions. Word has length 30 [2020-10-13 23:23:10,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:10,967 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 116 transitions. [2020-10-13 23:23:10,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:23:10,967 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 116 transitions. [2020-10-13 23:23:10,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:23:10,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:10,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:10,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:23:10,969 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:10,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:10,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2036100236, now seen corresponding path program 1 times [2020-10-13 23:23:10,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:10,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143838830] [2020-10-13 23:23:10,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:10,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:11,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:11,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:11,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:11,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:11,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:13,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:13,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:23:13,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:23:13,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2846 [2020-10-13 23:23:13,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:13,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:13,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:23:13,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:13,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:23:13,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:13,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:13,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:13,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:13,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:13,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:13,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:13,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:13,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:13,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:13,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:13,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:13,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:13,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 23:23:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:13,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:13,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:14,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:14,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 23:23:14,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:23:14,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-13 23:23:14,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:14,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:14,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:23:14,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:14,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:23:14,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:23:14,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143838830] [2020-10-13 23:23:14,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:23:14,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 23:23:14,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444135411] [2020-10-13 23:23:14,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:23:14,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:14,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:23:14,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:23:14,036 INFO L87 Difference]: Start difference. First operand 88 states and 116 transitions. Second operand 6 states. [2020-10-13 23:23:14,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:14,348 INFO L93 Difference]: Finished difference Result 161 states and 216 transitions. [2020-10-13 23:23:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:23:14,348 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-13 23:23:14,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:14,350 INFO L225 Difference]: With dead ends: 161 [2020-10-13 23:23:14,350 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 23:23:14,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:23:14,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 23:23:14,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 100. [2020-10-13 23:23:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 23:23:14,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 132 transitions. [2020-10-13 23:23:14,366 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 132 transitions. Word has length 30 [2020-10-13 23:23:14,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:14,367 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 132 transitions. [2020-10-13 23:23:14,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:23:14,367 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 132 transitions. [2020-10-13 23:23:14,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:23:14,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:14,369 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] [2020-10-13 23:23:14,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:23:14,369 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:14,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:14,370 INFO L82 PathProgramCache]: Analyzing trace with hash 902522764, now seen corresponding path program 2 times [2020-10-13 23:23:14,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:14,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195553906] [2020-10-13 23:23:14,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:14,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:14,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:14,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:14,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:14,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:14,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:14,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:15,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:16,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:16,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 23:23:16,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:23:16,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2193 [2020-10-13 23:23:16,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:16,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:16,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:23:16,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:16,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:23:16,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:16,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:16,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:16,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:16,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:16,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:16,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:16,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:16,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:16,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:16,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:16,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:16,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:16,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 23:23:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:16,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:16,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:16,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:16,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 23:23:16,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:23:16,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-13 23:23:16,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:16,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:16,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:23:16,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:16,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:23:16,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:23:16,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195553906] [2020-10-13 23:23:16,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:16,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:23:16,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627195439] [2020-10-13 23:23:16,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:23:16,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:16,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:23:16,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:23:16,806 INFO L87 Difference]: Start difference. First operand 100 states and 132 transitions. Second operand 7 states. [2020-10-13 23:23:17,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:17,239 INFO L93 Difference]: Finished difference Result 133 states and 176 transitions. [2020-10-13 23:23:17,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:23:17,240 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-13 23:23:17,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:17,243 INFO L225 Difference]: With dead ends: 133 [2020-10-13 23:23:17,243 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 23:23:17,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:23:17,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 23:23:17,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 102. [2020-10-13 23:23:17,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 23:23:17,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 134 transitions. [2020-10-13 23:23:17,262 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 134 transitions. Word has length 32 [2020-10-13 23:23:17,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:17,262 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 134 transitions. [2020-10-13 23:23:17,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:23:17,263 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 134 transitions. [2020-10-13 23:23:17,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:23:17,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:17,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:17,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:23:17,265 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:17,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:17,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1291853518, now seen corresponding path program 1 times [2020-10-13 23:23:17,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:17,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840966383] [2020-10-13 23:23:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:17,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:17,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:17,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:17,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:17,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:17,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:18,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:18,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:18,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 23:23:18,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:23:18,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1551 [2020-10-13 23:23:18,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:18,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:18,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:23:18,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:18,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:23:18,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:18,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:18,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:18,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:18,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:18,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:18,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:18,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:18,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:18,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:18,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:18,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:18,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:18,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 23:23:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:18,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:18,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:18,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:19,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:19,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 23:23:19,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:19,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-13 23:23:19,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:19,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:19,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:23:19,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:19,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:23:19,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:23:19,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840966383] [2020-10-13 23:23:19,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:23:19,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 23:23:19,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111494326] [2020-10-13 23:23:19,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:23:19,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:19,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:23:19,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:23:19,020 INFO L87 Difference]: Start difference. First operand 102 states and 134 transitions. Second operand 6 states. [2020-10-13 23:23:19,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:19,340 INFO L93 Difference]: Finished difference Result 130 states and 171 transitions. [2020-10-13 23:23:19,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:23:19,341 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-13 23:23:19,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:19,343 INFO L225 Difference]: With dead ends: 130 [2020-10-13 23:23:19,343 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 23:23:19,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:23:19,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 23:23:19,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 103. [2020-10-13 23:23:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 23:23:19,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 135 transitions. [2020-10-13 23:23:19,361 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 135 transitions. Word has length 32 [2020-10-13 23:23:19,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:19,362 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 135 transitions. [2020-10-13 23:23:19,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:23:19,362 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 135 transitions. [2020-10-13 23:23:19,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:23:19,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:19,363 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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:19,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:23:19,363 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:19,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:19,364 INFO L82 PathProgramCache]: Analyzing trace with hash 770179703, now seen corresponding path program 1 times [2020-10-13 23:23:19,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:19,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934129019] [2020-10-13 23:23:19,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:19,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:19,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:19,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:19,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:19,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:19,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:19,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:19,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:19,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:20,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:20,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:20,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:20,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:24,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:24,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:23:24,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 23:23:24,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:23:24,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:24,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:24,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:23:24,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 23:23:24,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:23:24,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:24,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:24,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:24,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:24,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:24,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:24,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:23:24,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:24,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:24,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:24,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:24,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:24,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:24,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 23:23:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:24,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:24,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:24,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 23:23:24,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:24,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:23:24,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:24,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:24,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:24,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:24,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:24,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:24,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 23:23:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:24,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:24,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:24,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:23:24,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:24,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:24,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:24,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:24,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:24,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:24,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:24,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:23:24,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934129019] [2020-10-13 23:23:24,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:23:24,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:23:24,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642739724] [2020-10-13 23:23:24,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:23:24,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:24,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:23:24,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:23:24,461 INFO L87 Difference]: Start difference. First operand 103 states and 135 transitions. Second operand 4 states. [2020-10-13 23:23:24,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:24,632 INFO L93 Difference]: Finished difference Result 133 states and 174 transitions. [2020-10-13 23:23:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:23:24,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-13 23:23:24,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:24,634 INFO L225 Difference]: With dead ends: 133 [2020-10-13 23:23:24,634 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 23:23:24,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:23:24,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 23:23:24,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2020-10-13 23:23:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 23:23:24,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 141 transitions. [2020-10-13 23:23:24,650 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 141 transitions. Word has length 35 [2020-10-13 23:23:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:24,650 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 141 transitions. [2020-10-13 23:23:24,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:23:24,651 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 141 transitions. [2020-10-13 23:23:24,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:23:24,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:24,652 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, 1, 1] [2020-10-13 23:23:24,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:23:24,653 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:24,653 INFO L82 PathProgramCache]: Analyzing trace with hash -921474685, now seen corresponding path program 1 times [2020-10-13 23:23:24,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:24,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047175389] [2020-10-13 23:23:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:24,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:24,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:24,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:24,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:24,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:24,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:25,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:27,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:27,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:23:27,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:23:27,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2600 [2020-10-13 23:23:27,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:27,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:27,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:23:27,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:23:27,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:23:27,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:27,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:27,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:27,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:27,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:27,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:27,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:27,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:27,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:27,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:27,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:27,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:27,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:27,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 23:23:27,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:27,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:27,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:27,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:27,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 23:23:27,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:23:27,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-13 23:23:27,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:27,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:27,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:23:27,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:27,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:23:27,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 23:23:27,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047175389] [2020-10-13 23:23:27,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:23:27,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:23:27,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451130600] [2020-10-13 23:23:27,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:23:27,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:27,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:23:27,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:23:27,409 INFO L87 Difference]: Start difference. First operand 107 states and 141 transitions. Second operand 5 states. [2020-10-13 23:23:27,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:27,613 INFO L93 Difference]: Finished difference Result 136 states and 176 transitions. [2020-10-13 23:23:27,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:23:27,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-13 23:23:27,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:27,614 INFO L225 Difference]: With dead ends: 136 [2020-10-13 23:23:27,615 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 23:23:27,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:23:27,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 23:23:27,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-13 23:23:27,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 23:23:27,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 120 transitions. [2020-10-13 23:23:27,628 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 120 transitions. Word has length 35 [2020-10-13 23:23:27,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:27,629 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 120 transitions. [2020-10-13 23:23:27,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:23:27,629 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 120 transitions. [2020-10-13 23:23:27,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:23:27,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:27,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:27,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:23:27,630 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:27,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:27,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2030512197, now seen corresponding path program 1 times [2020-10-13 23:23:27,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:27,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266960791] [2020-10-13 23:23:27,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:27,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:27,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:27,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:27,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:28,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:28,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:23:28,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:23:28,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 647 [2020-10-13 23:23:28,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:28,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:28,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:23:28,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:23:28,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:23:28,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:28,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:28,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:28,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:28,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:28,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:28,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:28,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:28,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:28,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:28,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:28,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:28,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:28,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 23:23:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:28,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:28,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:28,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 23:23:28,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:28,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-13 23:23:28,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:28,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:28,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:23:28,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:28,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:23:28,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:23:28,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266960791] [2020-10-13 23:23:28,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:23:28,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 23:23:28,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816843912] [2020-10-13 23:23:28,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:23:28,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:28,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:23:28,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:23:28,463 INFO L87 Difference]: Start difference. First operand 94 states and 120 transitions. Second operand 6 states. [2020-10-13 23:23:28,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:28,739 INFO L93 Difference]: Finished difference Result 134 states and 173 transitions. [2020-10-13 23:23:28,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:23:28,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-13 23:23:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:28,740 INFO L225 Difference]: With dead ends: 134 [2020-10-13 23:23:28,741 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 23:23:28,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:23:28,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 23:23:28,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 103. [2020-10-13 23:23:28,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 23:23:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 131 transitions. [2020-10-13 23:23:28,757 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 131 transitions. Word has length 35 [2020-10-13 23:23:28,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:28,758 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 131 transitions. [2020-10-13 23:23:28,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:23:28,758 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 131 transitions. [2020-10-13 23:23:28,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 23:23:28,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:28,759 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, 1, 1, 1] [2020-10-13 23:23:28,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:23:28,759 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:28,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:28,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1918489355, now seen corresponding path program 1 times [2020-10-13 23:23:28,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:28,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150677155] [2020-10-13 23:23:28,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:28,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:28,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:28,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:29,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:29,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:30,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:33,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:33,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 23:23:33,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:23:33,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:23:33,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:33,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:33,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:23:33,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:23:33,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:23:33,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:33,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:33,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:33,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:33,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:33,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:33,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:33,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:33,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:33,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:33,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:33,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:33,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:33,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 23:23:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:33,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:33,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:33,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:33,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 23:23:33,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:23:33,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-13 23:23:33,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:33,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:33,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:23:33,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:33,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:23:33,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:23:34,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150677155] [2020-10-13 23:23:34,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:34,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:23:34,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640074620] [2020-10-13 23:23:34,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:23:34,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:34,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:23:34,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:23:34,119 INFO L87 Difference]: Start difference. First operand 103 states and 131 transitions. Second operand 10 states. [2020-10-13 23:23:34,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:34,709 INFO L93 Difference]: Finished difference Result 180 states and 239 transitions. [2020-10-13 23:23:34,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:23:34,709 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-13 23:23:34,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:34,711 INFO L225 Difference]: With dead ends: 180 [2020-10-13 23:23:34,711 INFO L226 Difference]: Without dead ends: 170 [2020-10-13 23:23:34,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:23:34,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-13 23:23:34,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 121. [2020-10-13 23:23:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 23:23:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 155 transitions. [2020-10-13 23:23:34,732 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 155 transitions. Word has length 36 [2020-10-13 23:23:34,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:34,732 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 155 transitions. [2020-10-13 23:23:34,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:23:34,732 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 155 transitions. [2020-10-13 23:23:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:23:34,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:34,733 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, 1, 1, 1, 1] [2020-10-13 23:23:34,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:23:34,734 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:34,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:34,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1976319871, now seen corresponding path program 1 times [2020-10-13 23:23:34,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:34,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973717759] [2020-10-13 23:23:34,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:34,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:34,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:34,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:23:34,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:34,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-13 23:23:34,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:34,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:34,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:23:34,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:23:34,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:23:34,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:35,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:35,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:35,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:35,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:35,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:35,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:35,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:35,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:35,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:35,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:35,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:35,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:35,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 23:23:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:35,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:35,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:35,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 23:23:35,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:35,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 23:23:35,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:35,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:35,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:35,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:35,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:35,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:23:35,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973717759] [2020-10-13 23:23:35,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:35,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:23:35,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62927752] [2020-10-13 23:23:35,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:23:35,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:35,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:23:35,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:23:35,049 INFO L87 Difference]: Start difference. First operand 121 states and 155 transitions. Second operand 8 states. [2020-10-13 23:23:35,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:35,326 INFO L93 Difference]: Finished difference Result 172 states and 226 transitions. [2020-10-13 23:23:35,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:23:35,327 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-13 23:23:35,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:35,328 INFO L225 Difference]: With dead ends: 172 [2020-10-13 23:23:35,328 INFO L226 Difference]: Without dead ends: 163 [2020-10-13 23:23:35,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:23:35,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-13 23:23:35,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 149. [2020-10-13 23:23:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-13 23:23:35,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 197 transitions. [2020-10-13 23:23:35,347 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 197 transitions. Word has length 37 [2020-10-13 23:23:35,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:35,347 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 197 transitions. [2020-10-13 23:23:35,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:23:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 197 transitions. [2020-10-13 23:23:35,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:23:35,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:35,349 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, 1, 1, 1, 1] [2020-10-13 23:23:35,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:23:35,349 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:35,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:35,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1509300799, now seen corresponding path program 1 times [2020-10-13 23:23:35,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:35,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603360450] [2020-10-13 23:23:35,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:35,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:35,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:35,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:23:35,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:35,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-13 23:23:35,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:35,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:35,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:23:35,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 23:23:35,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:23:35,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:35,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:35,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:35,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:35,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:35,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:35,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:23:35,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:35,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:35,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:35,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:35,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:35,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:35,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 23:23:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:35,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:35,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:35,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 23:23:35,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:35,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-13 23:23:35,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:35,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:35,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:23:35,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:35,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:23:35,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 23:23:35,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603360450] [2020-10-13 23:23:35,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:35,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:23:35,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143167890] [2020-10-13 23:23:35,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:23:35,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:35,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:23:35,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:23:35,959 INFO L87 Difference]: Start difference. First operand 149 states and 197 transitions. Second operand 10 states. [2020-10-13 23:23:36,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:36,567 INFO L93 Difference]: Finished difference Result 280 states and 384 transitions. [2020-10-13 23:23:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:23:36,567 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-13 23:23:36,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:36,571 INFO L225 Difference]: With dead ends: 280 [2020-10-13 23:23:36,571 INFO L226 Difference]: Without dead ends: 231 [2020-10-13 23:23:36,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:23:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-13 23:23:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-10-13 23:23:36,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-13 23:23:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 214 transitions. [2020-10-13 23:23:36,596 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 214 transitions. Word has length 37 [2020-10-13 23:23:36,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:36,597 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 214 transitions. [2020-10-13 23:23:36,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:23:36,597 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 214 transitions. [2020-10-13 23:23:36,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:23:36,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:36,598 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:36,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:23:36,598 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:36,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:36,599 INFO L82 PathProgramCache]: Analyzing trace with hash -893450074, now seen corresponding path program 1 times [2020-10-13 23:23:36,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:36,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812001129] [2020-10-13 23:23:36,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:36,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:36,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:36,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:36,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:36,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:37,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:37,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:37,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:37,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:41,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:41,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 23:23:41,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:23:41,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 23:23:41,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:41,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:41,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:23:41,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:41,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:23:41,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:41,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:41,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:41,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:41,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:41,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:41,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:41,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:41,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:41,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:41,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:41,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:41,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:41,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 23:23:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:41,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:41,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:41,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:41,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:41,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 23:23:41,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:41,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-13 23:23:41,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:41,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:41,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:23:41,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:41,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:23:41,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:23:41,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812001129] [2020-10-13 23:23:41,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:41,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:23:41,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979214953] [2020-10-13 23:23:41,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:23:41,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:41,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:23:41,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:23:41,951 INFO L87 Difference]: Start difference. First operand 163 states and 214 transitions. Second operand 8 states. [2020-10-13 23:23:42,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:42,441 INFO L93 Difference]: Finished difference Result 188 states and 246 transitions. [2020-10-13 23:23:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:23:42,444 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-13 23:23:42,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:42,446 INFO L225 Difference]: With dead ends: 188 [2020-10-13 23:23:42,446 INFO L226 Difference]: Without dead ends: 156 [2020-10-13 23:23:42,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:23:42,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-13 23:23:42,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 139. [2020-10-13 23:23:42,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 23:23:42,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 180 transitions. [2020-10-13 23:23:42,470 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 180 transitions. Word has length 39 [2020-10-13 23:23:42,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:42,471 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 180 transitions. [2020-10-13 23:23:42,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:23:42,471 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 180 transitions. [2020-10-13 23:23:42,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 23:23:42,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:42,472 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:42,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:23:42,472 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:42,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:42,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1679519854, now seen corresponding path program 2 times [2020-10-13 23:23:42,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:42,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439744665] [2020-10-13 23:23:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:42,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:42,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:42,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:42,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:43,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:43,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:43,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:43,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:43,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:47,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:47,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 23:23:47,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:23:47,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 23:23:47,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:47,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:47,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:23:47,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:47,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 23:23:47,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:47,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:47,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:47,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:47,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:47,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:47,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:47,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:47,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:47,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:47,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:47,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:47,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:47,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 23:23:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:47,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:47,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:47,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:47,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 23:23:47,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:23:47,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-13 23:23:47,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:47,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:47,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:23:47,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:47,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:23:47,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:23:47,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439744665] [2020-10-13 23:23:47,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:47,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:23:47,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100378492] [2020-10-13 23:23:47,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:23:47,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:47,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:23:47,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:23:47,816 INFO L87 Difference]: Start difference. First operand 139 states and 180 transitions. Second operand 10 states. [2020-10-13 23:23:48,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:48,618 INFO L93 Difference]: Finished difference Result 282 states and 383 transitions. [2020-10-13 23:23:48,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:23:48,618 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-13 23:23:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:48,620 INFO L225 Difference]: With dead ends: 282 [2020-10-13 23:23:48,620 INFO L226 Difference]: Without dead ends: 248 [2020-10-13 23:23:48,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:23:48,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-13 23:23:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 170. [2020-10-13 23:23:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-13 23:23:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 224 transitions. [2020-10-13 23:23:48,649 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 224 transitions. Word has length 40 [2020-10-13 23:23:48,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:48,649 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 224 transitions. [2020-10-13 23:23:48,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:23:48,649 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 224 transitions. [2020-10-13 23:23:48,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 23:23:48,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:48,650 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:48,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:23:48,653 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:48,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:48,653 INFO L82 PathProgramCache]: Analyzing trace with hash -273284892, now seen corresponding path program 2 times [2020-10-13 23:23:48,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:48,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645247889] [2020-10-13 23:23:48,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:48,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:48,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:48,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:48,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:49,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:49,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:49,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:53,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:53,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 23:23:53,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:23:53,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:23:53,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:53,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:53,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:23:53,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:23:53,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:23:53,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:53,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:53,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:53,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:53,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:53,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:53,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:53,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:53,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:53,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:53,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:53,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:53,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:53,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 23:23:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:53,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:53,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:53,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 23:23:53,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:53,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 23:23:53,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:53,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:53,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:23:53,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:53,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:23:53,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:23:53,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645247889] [2020-10-13 23:23:53,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:53,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:23:53,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358323596] [2020-10-13 23:23:53,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:23:53,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:53,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:23:53,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:23:53,810 INFO L87 Difference]: Start difference. First operand 170 states and 224 transitions. Second operand 9 states. [2020-10-13 23:23:54,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:54,633 INFO L93 Difference]: Finished difference Result 329 states and 449 transitions. [2020-10-13 23:23:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:23:54,634 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-10-13 23:23:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:54,637 INFO L225 Difference]: With dead ends: 329 [2020-10-13 23:23:54,637 INFO L226 Difference]: Without dead ends: 277 [2020-10-13 23:23:54,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:23:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-13 23:23:54,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 180. [2020-10-13 23:23:54,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-13 23:23:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 243 transitions. [2020-10-13 23:23:54,672 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 243 transitions. Word has length 41 [2020-10-13 23:23:54,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:54,672 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 243 transitions. [2020-10-13 23:23:54,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:23:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 243 transitions. [2020-10-13 23:23:54,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:23:54,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:54,674 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:54,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:23:54,674 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:54,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:54,675 INFO L82 PathProgramCache]: Analyzing trace with hash 962862516, now seen corresponding path program 1 times [2020-10-13 23:23:54,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:54,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884623560] [2020-10-13 23:23:54,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:54,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:54,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:54,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:54,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:54,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:55,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:55,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:55,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:55,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:55,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:55,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:56,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:56,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:56,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:56,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:56,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:56,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:56,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:57,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:57,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:57,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:57,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:57,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:57,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:57,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:57,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:57,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:57,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:57,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:57,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:57,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:57,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:58,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:58,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:58,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:58,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:58,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:58,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:59,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:59,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:23:59,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 38 [2020-10-13 23:23:59,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:23:59,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:59,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:59,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:23:59,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 23:23:59,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:23:59,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:59,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:59,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:59,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:59,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:59,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:59,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:59,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:59,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:59,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:59,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:59,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:59,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:59,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 23:23:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:59,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:59,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:59,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 23:23:59,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:59,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:59,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:59,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:59,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:59,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:59,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:59,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:59,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 23:23:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:59,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:59,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:59,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:23:59,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:59,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:59,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:59,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:59,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:59,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:59,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:59,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:23:59,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884623560] [2020-10-13 23:23:59,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:59,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:23:59,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320956617] [2020-10-13 23:23:59,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:23:59,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:59,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:23:59,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:23:59,803 INFO L87 Difference]: Start difference. First operand 180 states and 243 transitions. Second operand 6 states. [2020-10-13 23:24:00,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:00,122 INFO L93 Difference]: Finished difference Result 212 states and 284 transitions. [2020-10-13 23:24:00,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:24:00,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-10-13 23:24:00,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:00,125 INFO L225 Difference]: With dead ends: 212 [2020-10-13 23:24:00,125 INFO L226 Difference]: Without dead ends: 191 [2020-10-13 23:24:00,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:24:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-13 23:24:00,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2020-10-13 23:24:00,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-13 23:24:00,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 253 transitions. [2020-10-13 23:24:00,147 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 253 transitions. Word has length 42 [2020-10-13 23:24:00,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:00,147 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 253 transitions. [2020-10-13 23:24:00,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:24:00,148 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 253 transitions. [2020-10-13 23:24:00,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:24:00,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:00,149 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:00,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:24:00,149 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:00,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:00,149 INFO L82 PathProgramCache]: Analyzing trace with hash -570195984, now seen corresponding path program 3 times [2020-10-13 23:24:00,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:00,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907159399] [2020-10-13 23:24:00,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:00,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:00,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:00,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:00,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:00,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:00,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:00,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:00,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:00,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:01,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:01,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:05,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:05,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 23:24:05,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 23:24:05,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:24:05,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:05,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:05,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:24:05,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:24:05,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:24:05,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:05,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:05,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:05,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:05,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:05,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:05,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:05,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:05,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:05,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:05,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:05,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:05,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:05,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 23:24:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:05,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:05,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:05,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:05,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 23:24:05,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:24:05,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-13 23:24:05,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:05,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:05,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:24:05,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:05,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:24:05,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:24:05,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907159399] [2020-10-13 23:24:05,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:05,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:24:05,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074885762] [2020-10-13 23:24:05,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:24:05,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:05,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:24:05,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:24:05,368 INFO L87 Difference]: Start difference. First operand 187 states and 253 transitions. Second operand 10 states. [2020-10-13 23:24:06,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:06,018 INFO L93 Difference]: Finished difference Result 295 states and 402 transitions. [2020-10-13 23:24:06,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:24:06,018 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-13 23:24:06,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:06,021 INFO L225 Difference]: With dead ends: 295 [2020-10-13 23:24:06,021 INFO L226 Difference]: Without dead ends: 268 [2020-10-13 23:24:06,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:24:06,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-13 23:24:06,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 186. [2020-10-13 23:24:06,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-13 23:24:06,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 247 transitions. [2020-10-13 23:24:06,050 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 247 transitions. Word has length 42 [2020-10-13 23:24:06,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:06,051 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 247 transitions. [2020-10-13 23:24:06,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:24:06,051 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 247 transitions. [2020-10-13 23:24:06,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 23:24:06,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:06,052 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:06,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:24:06,053 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:06,053 INFO L82 PathProgramCache]: Analyzing trace with hash 757899618, now seen corresponding path program 3 times [2020-10-13 23:24:06,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:06,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019635648] [2020-10-13 23:24:06,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:06,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:06,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:06,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 23:24:06,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:06,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-13 23:24:06,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:06,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:06,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:24:06,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 23:24:06,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:24:06,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:06,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:06,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:06,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:06,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:06,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:06,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:06,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:06,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:06,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:06,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:06,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:06,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:06,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 23:24:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:06,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:06,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:06,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 23:24:06,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:06,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-13 23:24:06,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:06,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:06,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:24:06,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:06,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:24:06,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:24:06,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019635648] [2020-10-13 23:24:06,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:06,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:24:06,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103136649] [2020-10-13 23:24:06,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:24:06,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:06,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:24:06,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:24:06,827 INFO L87 Difference]: Start difference. First operand 186 states and 247 transitions. Second operand 14 states. [2020-10-13 23:24:07,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:07,883 INFO L93 Difference]: Finished difference Result 333 states and 447 transitions. [2020-10-13 23:24:07,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:24:07,884 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-13 23:24:07,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:07,886 INFO L225 Difference]: With dead ends: 333 [2020-10-13 23:24:07,886 INFO L226 Difference]: Without dead ends: 229 [2020-10-13 23:24:07,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:24:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-13 23:24:07,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 206. [2020-10-13 23:24:07,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-13 23:24:07,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 270 transitions. [2020-10-13 23:24:07,911 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 270 transitions. Word has length 43 [2020-10-13 23:24:07,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:07,912 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 270 transitions. [2020-10-13 23:24:07,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:24:07,912 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 270 transitions. [2020-10-13 23:24:07,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:24:07,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:07,913 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1] [2020-10-13 23:24:07,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:24:07,914 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:07,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:07,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1766981426, now seen corresponding path program 4 times [2020-10-13 23:24:07,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:07,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30962359] [2020-10-13 23:24:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:07,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:07,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:08,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:08,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:08,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:08,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:08,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:08,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:08,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:08,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:09,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:09,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:09,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:12,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:12,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:24:12,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 23:24:12,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:24:12,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:12,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:12,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:24:12,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:24:12,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:24:12,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:13,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:13,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:13,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:13,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:13,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:13,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:13,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:13,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:13,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:13,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:13,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:13,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:13,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 23:24:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:13,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:13,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:13,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 23:24:13,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:13,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-13 23:24:13,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:13,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:13,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:24:13,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 23:24:13,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:24:13,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:24:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:24:13,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30962359] [2020-10-13 23:24:13,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:13,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:24:13,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198756158] [2020-10-13 23:24:13,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:24:13,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:13,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:24:13,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:24:13,364 INFO L87 Difference]: Start difference. First operand 206 states and 270 transitions. Second operand 11 states. [2020-10-13 23:24:16,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:16,312 INFO L93 Difference]: Finished difference Result 334 states and 445 transitions. [2020-10-13 23:24:16,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:24:16,313 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-13 23:24:16,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:16,315 INFO L225 Difference]: With dead ends: 334 [2020-10-13 23:24:16,315 INFO L226 Difference]: Without dead ends: 275 [2020-10-13 23:24:16,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:24:16,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-13 23:24:16,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 212. [2020-10-13 23:24:16,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-13 23:24:16,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 280 transitions. [2020-10-13 23:24:16,344 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 280 transitions. Word has length 44 [2020-10-13 23:24:16,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:16,344 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 280 transitions. [2020-10-13 23:24:16,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:24:16,345 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 280 transitions. [2020-10-13 23:24:16,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 23:24:16,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:16,347 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:16,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:24:16,347 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:16,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:16,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1049443872, now seen corresponding path program 1 times [2020-10-13 23:24:16,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:16,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462991016] [2020-10-13 23:24:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:16,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:16,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:16,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:24:16,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:16,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-13 23:24:16,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:16,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:16,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:24:16,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 23:24:16,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:24:16,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:16,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:16,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:16,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:16,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:16,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:16,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:16,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:16,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:16,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:16,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:16,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:16,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:16,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 23:24:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:16,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:16,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:16,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 23:24:16,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:16,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 23:24:16,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:16,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:16,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:16,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:16,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:16,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:24:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:24:16,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462991016] [2020-10-13 23:24:16,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:16,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:24:16,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731733885] [2020-10-13 23:24:16,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:24:16,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:16,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:24:16,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:24:16,753 INFO L87 Difference]: Start difference. First operand 212 states and 280 transitions. Second operand 9 states. [2020-10-13 23:24:17,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:17,168 INFO L93 Difference]: Finished difference Result 241 states and 318 transitions. [2020-10-13 23:24:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:24:17,168 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-10-13 23:24:17,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:17,171 INFO L225 Difference]: With dead ends: 241 [2020-10-13 23:24:17,171 INFO L226 Difference]: Without dead ends: 232 [2020-10-13 23:24:17,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:24:17,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-13 23:24:17,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 221. [2020-10-13 23:24:17,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-13 23:24:17,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 292 transitions. [2020-10-13 23:24:17,198 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 292 transitions. Word has length 45 [2020-10-13 23:24:17,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:17,199 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 292 transitions. [2020-10-13 23:24:17,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:24:17,199 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 292 transitions. [2020-10-13 23:24:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:24:17,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:17,201 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:17,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:24:17,201 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:17,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:17,202 INFO L82 PathProgramCache]: Analyzing trace with hash -364850778, now seen corresponding path program 1 times [2020-10-13 23:24:17,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:17,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463664879] [2020-10-13 23:24:17,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:17,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:17,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:17,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:17,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:17,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:17,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:17,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:17,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:17,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:17,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:18,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:18,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:18,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:18,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:18,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:18,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:18,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:18,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:18,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:18,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:18,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:19,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:22,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:22,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:24:22,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-13 23:24:22,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:24:22,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:22,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:22,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:24:22,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:24:22,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:24:22,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:24:22,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:22,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:22,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:22,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:22,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:22,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:22,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:22,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:22,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:22,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:22,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:22,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:22,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 23:24:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:22,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:22,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:22,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:22,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 23:24:22,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:24:22,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 23:24:22,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:22,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:22,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:24:22,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:22,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:24:22,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:22,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 23:24:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:22,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:22,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:22,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:24:22,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:22,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:24:22,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:22,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:22,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:24:22,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:22,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:24:22,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:24:22,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-13 23:24:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:22,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:22,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:22,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:24:22,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:22,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:22,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:22,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:22,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:24:22,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:22,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:24:22,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:24:22,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463664879] [2020-10-13 23:24:22,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:22,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:24:22,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934325154] [2020-10-13 23:24:22,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:24:22,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:22,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:24:22,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:24:22,339 INFO L87 Difference]: Start difference. First operand 221 states and 292 transitions. Second operand 7 states. [2020-10-13 23:24:22,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:22,747 INFO L93 Difference]: Finished difference Result 266 states and 352 transitions. [2020-10-13 23:24:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:24:22,747 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-10-13 23:24:22,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:22,749 INFO L225 Difference]: With dead ends: 266 [2020-10-13 23:24:22,749 INFO L226 Difference]: Without dead ends: 212 [2020-10-13 23:24:22,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:24:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-13 23:24:22,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 209. [2020-10-13 23:24:22,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-13 23:24:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 274 transitions. [2020-10-13 23:24:22,787 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 274 transitions. Word has length 47 [2020-10-13 23:24:22,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:22,788 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 274 transitions. [2020-10-13 23:24:22,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:24:22,788 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 274 transitions. [2020-10-13 23:24:22,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 23:24:22,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:22,789 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:22,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:24:22,790 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:22,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:22,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1789902259, now seen corresponding path program 1 times [2020-10-13 23:24:22,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:22,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7655900] [2020-10-13 23:24:22,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:22,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:22,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:23,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:23,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:23,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:23,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:24,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:27,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:27,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 23:24:27,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:24:27,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:24:27,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:27,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:27,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:24:27,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:24:27,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 23:24:27,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:27,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:27,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:27,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:27,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:27,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:27,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:24:27,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:27,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:27,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:27,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:27,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:27,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:27,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 23:24:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:27,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:27,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:28,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:28,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 23:24:28,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:24:28,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-13 23:24:28,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:28,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:28,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:24:28,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 23:24:28,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:24:28,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:24:28,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7655900] [2020-10-13 23:24:28,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:28,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:24:28,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163895963] [2020-10-13 23:24:28,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:24:28,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:28,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:24:28,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:24:28,161 INFO L87 Difference]: Start difference. First operand 209 states and 274 transitions. Second operand 12 states. [2020-10-13 23:24:28,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:28,889 INFO L93 Difference]: Finished difference Result 329 states and 439 transitions. [2020-10-13 23:24:28,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:24:28,890 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-13 23:24:28,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:28,892 INFO L225 Difference]: With dead ends: 329 [2020-10-13 23:24:28,892 INFO L226 Difference]: Without dead ends: 255 [2020-10-13 23:24:28,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:24:28,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-13 23:24:28,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 204. [2020-10-13 23:24:28,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-13 23:24:28,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 269 transitions. [2020-10-13 23:24:28,922 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 269 transitions. Word has length 46 [2020-10-13 23:24:28,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:28,923 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 269 transitions. [2020-10-13 23:24:28,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:24:28,923 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 269 transitions. [2020-10-13 23:24:28,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:24:28,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:28,924 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:28,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:24:28,925 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:28,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:28,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1075441379, now seen corresponding path program 1 times [2020-10-13 23:24:28,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:28,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366016713] [2020-10-13 23:24:28,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:28,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:29,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:29,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 23:24:29,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:29,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-13 23:24:29,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:29,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:29,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:24:29,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 23:24:29,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:24:29,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:29,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:29,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:29,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:29,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:29,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:29,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:29,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:29,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:29,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:29,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:29,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:29,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:29,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 23:24:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:29,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:29,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:29,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 23:24:29,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:29,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-13 23:24:29,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:29,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:29,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:24:29,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:29,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:24:29,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 23:24:29,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366016713] [2020-10-13 23:24:29,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:29,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:24:29,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163539776] [2020-10-13 23:24:29,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:24:29,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:29,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:24:29,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:24:29,617 INFO L87 Difference]: Start difference. First operand 204 states and 269 transitions. Second operand 12 states. [2020-10-13 23:24:31,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:31,015 INFO L93 Difference]: Finished difference Result 329 states and 448 transitions. [2020-10-13 23:24:31,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:24:31,016 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-13 23:24:31,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:31,019 INFO L225 Difference]: With dead ends: 329 [2020-10-13 23:24:31,019 INFO L226 Difference]: Without dead ends: 292 [2020-10-13 23:24:31,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:24:31,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-13 23:24:31,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 225. [2020-10-13 23:24:31,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-13 23:24:31,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 296 transitions. [2020-10-13 23:24:31,044 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 296 transitions. Word has length 47 [2020-10-13 23:24:31,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:31,045 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 296 transitions. [2020-10-13 23:24:31,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:24:31,045 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 296 transitions. [2020-10-13 23:24:31,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 23:24:31,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:31,047 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:31,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:24:31,047 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:31,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:31,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1536895055, now seen corresponding path program 2 times [2020-10-13 23:24:31,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:31,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605097057] [2020-10-13 23:24:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:31,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:31,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:31,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:31,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:31,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:31,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:34,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:34,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:34,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:36,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:36,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:24:36,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:24:36,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 23:24:36,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:36,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:36,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:24:36,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:24:36,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:24:36,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:24:36,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:36,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:36,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:36,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:36,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:36,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:36,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:36,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:36,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:36,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:36,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:36,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:36,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 23:24:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:36,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:36,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:36,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:36,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:36,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 23:24:36,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:24:36,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-13 23:24:36,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:36,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:36,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:24:36,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:36,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:24:36,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:24:36,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605097057] [2020-10-13 23:24:36,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:36,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:24:36,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530339177] [2020-10-13 23:24:36,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:24:36,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:36,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:24:36,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:24:36,527 INFO L87 Difference]: Start difference. First operand 225 states and 296 transitions. Second operand 11 states. [2020-10-13 23:24:39,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:39,361 INFO L93 Difference]: Finished difference Result 337 states and 451 transitions. [2020-10-13 23:24:39,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:24:39,362 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-13 23:24:39,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:39,365 INFO L225 Difference]: With dead ends: 337 [2020-10-13 23:24:39,365 INFO L226 Difference]: Without dead ends: 329 [2020-10-13 23:24:39,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:24:39,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-10-13 23:24:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 231. [2020-10-13 23:24:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-13 23:24:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 305 transitions. [2020-10-13 23:24:39,395 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 305 transitions. Word has length 48 [2020-10-13 23:24:39,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:39,395 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 305 transitions. [2020-10-13 23:24:39,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:24:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 305 transitions. [2020-10-13 23:24:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 23:24:39,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:39,397 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:39,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:24:39,397 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:39,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:39,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1897660079, now seen corresponding path program 2 times [2020-10-13 23:24:39,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:39,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639782559] [2020-10-13 23:24:39,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:39,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:39,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:39,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:40,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:40,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:44,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:44,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:24:44,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:24:44,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:24:44,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:44,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:44,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:24:44,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:24:44,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:24:44,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:44,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:44,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:44,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:44,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:44,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:44,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:44,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:44,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:44,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:44,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:44,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:44,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:44,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 23:24:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:44,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:44,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:44,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 23:24:44,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:44,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 23:24:44,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:44,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:44,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:24:44,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:44,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:24:44,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 23:24:44,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639782559] [2020-10-13 23:24:44,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:44,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:24:44,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504015847] [2020-10-13 23:24:44,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:24:44,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:44,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:24:44,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:24:44,643 INFO L87 Difference]: Start difference. First operand 231 states and 305 transitions. Second operand 12 states. [2020-10-13 23:24:46,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:46,444 INFO L93 Difference]: Finished difference Result 479 states and 653 transitions. [2020-10-13 23:24:46,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:24:46,445 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-13 23:24:46,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:46,448 INFO L225 Difference]: With dead ends: 479 [2020-10-13 23:24:46,448 INFO L226 Difference]: Without dead ends: 441 [2020-10-13 23:24:46,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:24:46,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-10-13 23:24:46,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 280. [2020-10-13 23:24:46,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-13 23:24:46,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 373 transitions. [2020-10-13 23:24:46,485 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 373 transitions. Word has length 48 [2020-10-13 23:24:46,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:46,486 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 373 transitions. [2020-10-13 23:24:46,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:24:46,486 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 373 transitions. [2020-10-13 23:24:46,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 23:24:46,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:46,488 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:46,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:24:46,488 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:46,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:46,489 INFO L82 PathProgramCache]: Analyzing trace with hash -896579644, now seen corresponding path program 2 times [2020-10-13 23:24:46,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:46,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534170154] [2020-10-13 23:24:46,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:46,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:46,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:46,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:46,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:47,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:47,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:47,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:47,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:47,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:47,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:48,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:51,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:51,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 23:24:51,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 23:24:51,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:24:51,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:51,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:51,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:24:51,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:24:51,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:24:51,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:51,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:51,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:51,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:51,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:51,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:51,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:51,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:51,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:51,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:51,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:51,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:51,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:51,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 23:24:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:51,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:51,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:51,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 23:24:51,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:51,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 23:24:51,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:51,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:51,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:24:51,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:51,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:24:51,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 23:24:51,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534170154] [2020-10-13 23:24:51,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:51,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:24:51,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377291988] [2020-10-13 23:24:51,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:24:51,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:51,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:24:51,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:24:51,693 INFO L87 Difference]: Start difference. First operand 280 states and 373 transitions. Second operand 11 states. [2020-10-13 23:24:52,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:52,325 INFO L93 Difference]: Finished difference Result 337 states and 447 transitions. [2020-10-13 23:24:52,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:24:52,326 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-10-13 23:24:52,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:52,329 INFO L225 Difference]: With dead ends: 337 [2020-10-13 23:24:52,329 INFO L226 Difference]: Without dead ends: 311 [2020-10-13 23:24:52,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:24:52,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-13 23:24:52,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 280. [2020-10-13 23:24:52,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-13 23:24:52,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 372 transitions. [2020-10-13 23:24:52,360 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 372 transitions. Word has length 49 [2020-10-13 23:24:52,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:52,360 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 372 transitions. [2020-10-13 23:24:52,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:24:52,360 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 372 transitions. [2020-10-13 23:24:52,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:24:52,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:52,362 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1, 1] [2020-10-13 23:24:52,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:24:52,362 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:52,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:52,363 INFO L82 PathProgramCache]: Analyzing trace with hash -800756687, now seen corresponding path program 3 times [2020-10-13 23:24:52,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:52,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752867949] [2020-10-13 23:24:52,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:52,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:52,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:52,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:52,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:53,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:54,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:55,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:57,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:57,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:24:57,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:24:57,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:24:57,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:57,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:57,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:24:57,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:24:57,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:24:57,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:57,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:57,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:57,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:57,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:57,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:57,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:57,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:57,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:57,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:57,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:57,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:57,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:57,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 23:24:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:57,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:57,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:57,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:57,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 23:24:57,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:24:57,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-13 23:24:57,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:57,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:57,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:24:57,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:57,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:24:57,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:24:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 23:24:57,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752867949] [2020-10-13 23:24:57,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:57,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:24:57,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807940098] [2020-10-13 23:24:57,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:24:57,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:57,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:24:57,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:24:57,661 INFO L87 Difference]: Start difference. First operand 280 states and 372 transitions. Second operand 12 states. [2020-10-13 23:25:01,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:01,342 INFO L93 Difference]: Finished difference Result 485 states and 663 transitions. [2020-10-13 23:25:01,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:25:01,343 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-13 23:25:01,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:01,347 INFO L225 Difference]: With dead ends: 485 [2020-10-13 23:25:01,347 INFO L226 Difference]: Without dead ends: 401 [2020-10-13 23:25:01,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:25:01,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-10-13 23:25:01,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 283. [2020-10-13 23:25:01,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-13 23:25:01,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 378 transitions. [2020-10-13 23:25:01,394 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 378 transitions. Word has length 50 [2020-10-13 23:25:01,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:01,394 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 378 transitions. [2020-10-13 23:25:01,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:25:01,395 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 378 transitions. [2020-10-13 23:25:01,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:25:01,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:01,398 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:01,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:25:01,398 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:01,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:01,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1620894510, now seen corresponding path program 2 times [2020-10-13 23:25:01,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:01,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362431914] [2020-10-13 23:25:01,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:01,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:01,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:01,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:01,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:03,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:03,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:03,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:03,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:06,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:06,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:25:06,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:25:06,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:25:06,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:06,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:06,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:25:06,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:25:06,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 23:25:06,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:06,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:06,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:06,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:06,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:06,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:06,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:06,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:06,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:06,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:06,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:06,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:06,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:06,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 23:25:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:06,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:06,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:06,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:06,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:06,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:06,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 23:25:06,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:25:06,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 419 [2020-10-13 23:25:06,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:06,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:06,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:25:06,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:06,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:25:06,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:25:07,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362431914] [2020-10-13 23:25:07,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:07,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:25:07,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066317058] [2020-10-13 23:25:07,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:25:07,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:07,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:25:07,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:25:07,230 INFO L87 Difference]: Start difference. First operand 283 states and 378 transitions. Second operand 14 states. [2020-10-13 23:25:10,399 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-13 23:25:11,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:11,306 INFO L93 Difference]: Finished difference Result 476 states and 650 transitions. [2020-10-13 23:25:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:25:11,307 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-13 23:25:11,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:11,311 INFO L225 Difference]: With dead ends: 476 [2020-10-13 23:25:11,311 INFO L226 Difference]: Without dead ends: 428 [2020-10-13 23:25:11,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:25:11,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-10-13 23:25:11,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 279. [2020-10-13 23:25:11,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-13 23:25:11,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 374 transitions. [2020-10-13 23:25:11,348 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 374 transitions. Word has length 50 [2020-10-13 23:25:11,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:11,349 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 374 transitions. [2020-10-13 23:25:11,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:25:11,349 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 374 transitions. [2020-10-13 23:25:11,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:25:11,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:11,350 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:11,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:25:11,351 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:11,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:11,351 INFO L82 PathProgramCache]: Analyzing trace with hash 206897869, now seen corresponding path program 1 times [2020-10-13 23:25:11,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:11,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362098381] [2020-10-13 23:25:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:11,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:11,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:11,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:11,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:11,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:11,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:11,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:11,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:11,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:12,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:12,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:12,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:15,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:15,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:15,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:15,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:15,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:15,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:15,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:15,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:15,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:15,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:15,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:16,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:16,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 23:25:16,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-13 23:25:16,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:25:16,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:16,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:16,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:25:16,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 23:25:16,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:25:16,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:25:16,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:16,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:16,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:16,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:16,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:16,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:16,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:16,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:16,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:16,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:16,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:16,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:16,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 23:25:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:16,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:16,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:16,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:16,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 23:25:16,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:25:16,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 23:25:16,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:16,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:16,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:25:16,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:16,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:25:16,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:16,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 23:25:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:16,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:16,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:16,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:25:16,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:16,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:25:16,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:16,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:16,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:25:16,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:16,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:25:16,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:16,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 23:25:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:16,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:16,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:16,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:25:16,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:16,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:16,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:16,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:16,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:16,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:25:16,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:16,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 23:25:16,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362098381] [2020-10-13 23:25:16,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:25:16,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 23:25:16,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377441607] [2020-10-13 23:25:16,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:25:16,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:16,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:25:16,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:25:16,500 INFO L87 Difference]: Start difference. First operand 279 states and 374 transitions. Second operand 6 states. [2020-10-13 23:25:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:17,050 INFO L93 Difference]: Finished difference Result 326 states and 436 transitions. [2020-10-13 23:25:17,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:25:17,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-13 23:25:17,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:17,054 INFO L225 Difference]: With dead ends: 326 [2020-10-13 23:25:17,054 INFO L226 Difference]: Without dead ends: 305 [2020-10-13 23:25:17,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:25:17,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-13 23:25:17,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 283. [2020-10-13 23:25:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-13 23:25:17,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 379 transitions. [2020-10-13 23:25:17,095 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 379 transitions. Word has length 52 [2020-10-13 23:25:17,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:17,096 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 379 transitions. [2020-10-13 23:25:17,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:25:17,096 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 379 transitions. [2020-10-13 23:25:17,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:25:17,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:17,098 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-13 23:25:17,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:25:17,099 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:17,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:17,099 INFO L82 PathProgramCache]: Analyzing trace with hash -190808862, now seen corresponding path program 3 times [2020-10-13 23:25:17,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:17,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076342441] [2020-10-13 23:25:17,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:17,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:17,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:17,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:17,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:17,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:18,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:22,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:22,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:25:22,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:25:22,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:25:22,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:22,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:22,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:25:22,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:25:22,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:25:22,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:22,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:22,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:22,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:22,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:22,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:22,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:22,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:22,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:22,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:22,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:22,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:22,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:22,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 23:25:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:22,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:22,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:22,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 23:25:22,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:22,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 23:25:22,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:22,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:22,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:25:22,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:22,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:25:22,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 23:25:22,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076342441] [2020-10-13 23:25:22,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:22,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:25:22,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970704821] [2020-10-13 23:25:22,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:25:22,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:22,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:25:22,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:25:22,348 INFO L87 Difference]: Start difference. First operand 283 states and 379 transitions. Second operand 11 states. [2020-10-13 23:25:27,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:27,993 INFO L93 Difference]: Finished difference Result 498 states and 678 transitions. [2020-10-13 23:25:27,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:25:27,994 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-10-13 23:25:27,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:27,997 INFO L225 Difference]: With dead ends: 498 [2020-10-13 23:25:27,997 INFO L226 Difference]: Without dead ends: 412 [2020-10-13 23:25:27,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=66, Invalid=275, Unknown=1, NotChecked=0, Total=342 [2020-10-13 23:25:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-10-13 23:25:28,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 284. [2020-10-13 23:25:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-13 23:25:28,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 379 transitions. [2020-10-13 23:25:28,048 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 379 transitions. Word has length 51 [2020-10-13 23:25:28,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:28,048 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 379 transitions. [2020-10-13 23:25:28,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:25:28,049 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 379 transitions. [2020-10-13 23:25:28,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:25:28,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:28,051 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:28,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:25:28,052 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:28,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:28,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1718446726, now seen corresponding path program 1 times [2020-10-13 23:25:28,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:28,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381904987] [2020-10-13 23:25:28,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:28,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:28,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:28,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:28,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:28,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:30,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:30,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:30,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:30,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:30,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:30,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:30,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:30,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:30,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:31,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:31,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:31,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:31,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:31,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:31,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:31,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:31,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:32,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:32,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:32,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:32,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:32,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:32,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:32,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:33,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:33,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:33,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:33,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 23:25:33,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 31 [2020-10-13 23:25:33,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:25:33,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:33,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:33,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:25:33,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 23:25:33,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:25:33,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:33,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:33,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:33,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:33,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:33,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:33,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:33,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:33,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:33,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:33,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:33,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:33,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:33,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 23:25:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:33,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:33,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:33,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 23:25:33,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:33,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:25:33,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:33,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:33,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:33,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:33,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:33,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:33,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-13 23:25:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:33,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:33,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:33,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:25:33,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:33,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:25:33,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:33,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:33,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:33,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:33,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:33,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:25:33,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381904987] [2020-10-13 23:25:33,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:33,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:25:33,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702380348] [2020-10-13 23:25:33,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:25:33,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:33,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:25:33,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:25:33,176 INFO L87 Difference]: Start difference. First operand 284 states and 379 transitions. Second operand 5 states. [2020-10-13 23:25:33,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:33,516 INFO L93 Difference]: Finished difference Result 323 states and 428 transitions. [2020-10-13 23:25:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:25:33,518 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-10-13 23:25:33,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:33,520 INFO L225 Difference]: With dead ends: 323 [2020-10-13 23:25:33,520 INFO L226 Difference]: Without dead ends: 275 [2020-10-13 23:25:33,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:25:33,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-13 23:25:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 269. [2020-10-13 23:25:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-13 23:25:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 350 transitions. [2020-10-13 23:25:33,545 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 350 transitions. Word has length 52 [2020-10-13 23:25:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:33,545 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 350 transitions. [2020-10-13 23:25:33,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:25:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 350 transitions. [2020-10-13 23:25:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:25:33,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:33,547 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2020-10-13 23:25:33,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:25:33,548 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:33,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:33,548 INFO L82 PathProgramCache]: Analyzing trace with hash -550594189, now seen corresponding path program 4 times [2020-10-13 23:25:33,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:33,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601885271] [2020-10-13 23:25:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:33,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:33,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:33,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:25:33,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:33,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-13 23:25:33,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:33,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:33,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:25:33,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 23:25:33,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:25:33,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:25:34,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:34,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:34,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:34,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:34,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:34,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:34,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:34,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:34,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:34,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:34,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:34,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:34,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 23:25:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:34,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:34,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:34,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 23:25:34,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:34,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:25:34,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:34,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:34,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:34,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:34,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:34,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 23:25:34,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601885271] [2020-10-13 23:25:34,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:34,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:25:34,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851347821] [2020-10-13 23:25:34,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:25:34,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:34,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:25:34,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:25:34,026 INFO L87 Difference]: Start difference. First operand 269 states and 350 transitions. Second operand 10 states. [2020-10-13 23:25:34,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:34,634 INFO L93 Difference]: Finished difference Result 298 states and 388 transitions. [2020-10-13 23:25:34,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:25:34,635 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2020-10-13 23:25:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:34,637 INFO L225 Difference]: With dead ends: 298 [2020-10-13 23:25:34,637 INFO L226 Difference]: Without dead ends: 289 [2020-10-13 23:25:34,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:25:34,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-13 23:25:34,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 278. [2020-10-13 23:25:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-13 23:25:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 362 transitions. [2020-10-13 23:25:34,679 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 362 transitions. Word has length 52 [2020-10-13 23:25:34,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:34,680 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 362 transitions. [2020-10-13 23:25:34,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:25:34,680 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 362 transitions. [2020-10-13 23:25:34,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 23:25:34,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:34,682 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:34,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:25:34,682 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:34,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:34,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1993509811, now seen corresponding path program 1 times [2020-10-13 23:25:34,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:34,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676549001] [2020-10-13 23:25:34,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:34,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:34,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:34,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:35,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:35,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:35,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:35,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:35,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:37,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:37,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:37,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:37,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:38,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:38,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:38,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:38,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:39,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:39,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 23:25:39,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 23:25:39,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:25:39,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:39,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:39,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:25:39,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 23:25:39,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:25:39,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:39,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:39,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:39,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:39,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:39,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:39,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:39,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:39,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:39,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:39,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:39,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:39,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:39,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 23:25:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:39,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:39,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:39,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 23:25:39,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:39,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 23:25:39,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:39,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:39,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:25:39,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:39,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:25:39,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:39,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 23:25:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:39,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:39,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:39,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:25:39,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:39,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:25:39,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:39,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:39,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:25:39,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:39,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:25:39,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:39,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 23:25:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:39,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:39,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:39,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:25:39,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:39,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:25:39,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:39,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:39,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:25:39,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:39,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:25:39,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:25:39,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676549001] [2020-10-13 23:25:39,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:39,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:25:39,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931164136] [2020-10-13 23:25:39,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:25:39,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:39,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:25:39,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:25:39,929 INFO L87 Difference]: Start difference. First operand 278 states and 362 transitions. Second operand 9 states. [2020-10-13 23:25:40,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:40,479 INFO L93 Difference]: Finished difference Result 327 states and 427 transitions. [2020-10-13 23:25:40,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:25:40,480 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-10-13 23:25:40,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:40,482 INFO L225 Difference]: With dead ends: 327 [2020-10-13 23:25:40,482 INFO L226 Difference]: Without dead ends: 278 [2020-10-13 23:25:40,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:25:40,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-13 23:25:40,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 275. [2020-10-13 23:25:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-13 23:25:40,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 357 transitions. [2020-10-13 23:25:40,526 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 357 transitions. Word has length 54 [2020-10-13 23:25:40,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:40,527 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 357 transitions. [2020-10-13 23:25:40,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:25:40,527 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 357 transitions. [2020-10-13 23:25:40,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:25:40,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:40,532 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:40,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:25:40,532 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:40,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:40,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1423964192, now seen corresponding path program 4 times [2020-10-13 23:25:40,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:40,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549382038] [2020-10-13 23:25:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:40,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:40,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:41,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:42,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:42,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 23:25:42,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:25:42,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2401 [2020-10-13 23:25:42,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:42,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:42,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:25:42,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 23:25:42,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:25:42,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:43,106 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 38 [2020-10-13 23:25:43,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:43,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:43,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:43,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:43,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:43,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:43,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:43,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:43,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:43,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:43,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:43,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:43,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 23:25:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:43,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:43,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:43,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 23:25:43,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:43,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-13 23:25:43,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:43,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:43,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:25:43,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:43,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:25:43,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-13 23:25:43,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549382038] [2020-10-13 23:25:43,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:43,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:25:43,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852659232] [2020-10-13 23:25:43,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:25:43,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:43,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:25:43,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:25:43,321 INFO L87 Difference]: Start difference. First operand 275 states and 357 transitions. Second operand 10 states. [2020-10-13 23:25:44,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:44,036 INFO L93 Difference]: Finished difference Result 420 states and 560 transitions. [2020-10-13 23:25:44,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:25:44,036 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-13 23:25:44,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:44,038 INFO L225 Difference]: With dead ends: 420 [2020-10-13 23:25:44,038 INFO L226 Difference]: Without dead ends: 358 [2020-10-13 23:25:44,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:25:44,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-13 23:25:44,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 275. [2020-10-13 23:25:44,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-13 23:25:44,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 351 transitions. [2020-10-13 23:25:44,083 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 351 transitions. Word has length 53 [2020-10-13 23:25:44,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:44,083 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 351 transitions. [2020-10-13 23:25:44,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:25:44,083 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 351 transitions. [2020-10-13 23:25:44,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:25:44,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:44,085 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:44,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:25:44,085 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:44,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:44,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1158821276, now seen corresponding path program 5 times [2020-10-13 23:25:44,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:44,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307493383] [2020-10-13 23:25:44,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:44,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:44,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:44,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 23:25:44,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:44,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-10-13 23:25:44,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:44,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:25:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 23:25:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:25:44,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:44,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:44,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:44,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:44,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:44,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:44,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:44,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:44,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:44,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:44,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:44,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:44,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:44,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 23:25:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:44,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:44,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:44,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 23:25:44,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:44,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-13 23:25:44,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:44,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:44,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:25:44,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:44,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:25:44,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 23:25:45,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307493383] [2020-10-13 23:25:45,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:45,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:25:45,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368825117] [2020-10-13 23:25:45,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:25:45,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:45,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:25:45,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:25:45,191 INFO L87 Difference]: Start difference. First operand 275 states and 351 transitions. Second operand 16 states. [2020-10-13 23:25:46,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:46,070 INFO L93 Difference]: Finished difference Result 455 states and 586 transitions. [2020-10-13 23:25:46,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:25:46,071 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-13 23:25:46,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:46,073 INFO L225 Difference]: With dead ends: 455 [2020-10-13 23:25:46,073 INFO L226 Difference]: Without dead ends: 332 [2020-10-13 23:25:46,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:25:46,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-13 23:25:46,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 289. [2020-10-13 23:25:46,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-13 23:25:46,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 367 transitions. [2020-10-13 23:25:46,112 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 367 transitions. Word has length 53 [2020-10-13 23:25:46,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:46,112 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 367 transitions. [2020-10-13 23:25:46,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:25:46,113 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 367 transitions. [2020-10-13 23:25:46,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:25:46,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:46,114 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:25:46,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 23:25:46,114 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:46,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:46,115 INFO L82 PathProgramCache]: Analyzing trace with hash 925346222, now seen corresponding path program 6 times [2020-10-13 23:25:46,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:46,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753938527] [2020-10-13 23:25:46,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:46,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:46,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:46,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 23:25:46,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:46,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 532 [2020-10-13 23:25:46,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:46,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:46,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:25:46,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 23:25:46,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:25:46,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:46,915 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-10-13 23:25:46,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:46,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:46,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:46,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:46,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:46,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:46,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:46,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:46,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:46,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:46,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:46,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:25:46,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 23:25:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:46,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:47,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:47,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 23:25:47,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:47,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-13 23:25:47,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:47,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:47,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:25:47,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:47,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:25:47,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:25:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 23:25:47,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753938527] [2020-10-13 23:25:47,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:47,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:25:47,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393110941] [2020-10-13 23:25:47,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:25:47,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:47,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:25:47,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:25:47,361 INFO L87 Difference]: Start difference. First operand 289 states and 367 transitions. Second operand 16 states. [2020-10-13 23:25:48,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:48,655 INFO L93 Difference]: Finished difference Result 466 states and 603 transitions. [2020-10-13 23:25:48,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:25:48,655 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-13 23:25:48,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:48,660 INFO L225 Difference]: With dead ends: 466 [2020-10-13 23:25:48,660 INFO L226 Difference]: Without dead ends: 346 [2020-10-13 23:25:48,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:25:48,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-13 23:25:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 307. [2020-10-13 23:25:48,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-10-13 23:25:48,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 389 transitions. [2020-10-13 23:25:48,702 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 389 transitions. Word has length 53 [2020-10-13 23:25:48,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:48,703 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 389 transitions. [2020-10-13 23:25:48,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:25:48,703 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 389 transitions. [2020-10-13 23:25:48,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 23:25:48,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:48,705 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1] [2020-10-13 23:25:48,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 23:25:48,705 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:48,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:48,705 INFO L82 PathProgramCache]: Analyzing trace with hash -751167850, now seen corresponding path program 3 times [2020-10-13 23:25:48,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:48,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997743708] [2020-10-13 23:25:48,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:48,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:48,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:48,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:49,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:49,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:49,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:49,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:52,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:52,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:52,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:52,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:52,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:53,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:53,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 23:25:53,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:25:53,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:25:53,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:53,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:53,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:25:53,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:25:53,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:25:53,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:54,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:54,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:54,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:54,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:54,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:54,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:54,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:54,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:54,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:54,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:54,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:54,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:25:54,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 23:25:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:54,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:54,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:54,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:54,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:54,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 23:25:54,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:25:54,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-13 23:25:54,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:54,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:54,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:25:54,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:54,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:25:54,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 23:25:54,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997743708] [2020-10-13 23:25:54,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:54,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:25:54,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336023371] [2020-10-13 23:25:54,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:25:54,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:54,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:25:54,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:25:54,279 INFO L87 Difference]: Start difference. First operand 307 states and 389 transitions. Second operand 14 states. [2020-10-13 23:25:55,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:25:55,094 INFO L93 Difference]: Finished difference Result 391 states and 496 transitions. [2020-10-13 23:25:55,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:25:55,095 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-13 23:25:55,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:25:55,098 INFO L225 Difference]: With dead ends: 391 [2020-10-13 23:25:55,098 INFO L226 Difference]: Without dead ends: 383 [2020-10-13 23:25:55,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:25:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-10-13 23:25:55,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 310. [2020-10-13 23:25:55,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-13 23:25:55,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 392 transitions. [2020-10-13 23:25:55,139 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 392 transitions. Word has length 54 [2020-10-13 23:25:55,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:25:55,140 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 392 transitions. [2020-10-13 23:25:55,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:25:55,140 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 392 transitions. [2020-10-13 23:25:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 23:25:55,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:25:55,141 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2020-10-13 23:25:55,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 23:25:55,142 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:25:55,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:25:55,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1753245124, now seen corresponding path program 5 times [2020-10-13 23:25:55,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:25:55,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684454052] [2020-10-13 23:25:55,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:25:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:55,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:55,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:55,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:55,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:55,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:00,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:00,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 23:26:00,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:26:00,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 23:26:00,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:00,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:00,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:26:00,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:00,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 23:26:00,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:00,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:00,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:00,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:00,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:00,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:00,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:00,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:00,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:00,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:00,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:00,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:00,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:00,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 23:26:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:00,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:00,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:00,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 23:26:00,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:00,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 23:26:00,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:00,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:00,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:26:00,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:00,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:26:00,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:26:00,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684454052] [2020-10-13 23:26:00,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:00,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:26:00,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287932026] [2020-10-13 23:26:00,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:26:00,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:00,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:26:00,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:26:00,626 INFO L87 Difference]: Start difference. First operand 310 states and 392 transitions. Second operand 14 states. [2020-10-13 23:26:08,304 WARN L193 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-10-13 23:26:09,220 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-13 23:26:09,406 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-13 23:26:10,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:10,216 INFO L93 Difference]: Finished difference Result 573 states and 741 transitions. [2020-10-13 23:26:10,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:26:10,217 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-10-13 23:26:10,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:10,221 INFO L225 Difference]: With dead ends: 573 [2020-10-13 23:26:10,221 INFO L226 Difference]: Without dead ends: 524 [2020-10-13 23:26:10,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:26:10,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-10-13 23:26:10,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 345. [2020-10-13 23:26:10,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-13 23:26:10,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 441 transitions. [2020-10-13 23:26:10,266 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 441 transitions. Word has length 55 [2020-10-13 23:26:10,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:10,267 INFO L479 AbstractCegarLoop]: Abstraction has 345 states and 441 transitions. [2020-10-13 23:26:10,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:26:10,267 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 441 transitions. [2020-10-13 23:26:10,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 23:26:10,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:10,269 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:10,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 23:26:10,270 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:10,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:10,270 INFO L82 PathProgramCache]: Analyzing trace with hash -728194430, now seen corresponding path program 2 times [2020-10-13 23:26:10,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:10,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392471539] [2020-10-13 23:26:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:10,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:10,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:10,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 23:26:10,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:10,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-13 23:26:10,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:10,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:10,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:26:10,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 23:26:10,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 23:26:10,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:10,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:10,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:10,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:10,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:10,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:10,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:10,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:10,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:10,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:10,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:10,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:10,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:10,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 23:26:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:10,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:10,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:10,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 23:26:10,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:10,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-13 23:26:10,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:10,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:10,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:26:10,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:10,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 23:26:10,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:10,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 23:26:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:10,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:10,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:10,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:26:10,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:10,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:26:10,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:10,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:10,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:26:10,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:10,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:26:10,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:10,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 23:26:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:10,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:10,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:10,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:26:10,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:10,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:10,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:10,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:10,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:26:10,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 23:26:10,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:26:10,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 23:26:10,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392471539] [2020-10-13 23:26:10,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:10,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:26:10,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503423795] [2020-10-13 23:26:10,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:26:10,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:10,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:26:10,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:26:10,857 INFO L87 Difference]: Start difference. First operand 345 states and 441 transitions. Second operand 12 states. [2020-10-13 23:26:11,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:11,721 INFO L93 Difference]: Finished difference Result 460 states and 599 transitions. [2020-10-13 23:26:11,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:26:11,723 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-13 23:26:11,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:11,725 INFO L225 Difference]: With dead ends: 460 [2020-10-13 23:26:11,725 INFO L226 Difference]: Without dead ends: 438 [2020-10-13 23:26:11,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:26:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-10-13 23:26:11,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 357. [2020-10-13 23:26:11,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-13 23:26:11,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 460 transitions. [2020-10-13 23:26:11,771 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 460 transitions. Word has length 57 [2020-10-13 23:26:11,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:11,771 INFO L479 AbstractCegarLoop]: Abstraction has 357 states and 460 transitions. [2020-10-13 23:26:11,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:26:11,771 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 460 transitions. [2020-10-13 23:26:11,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 23:26:11,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:11,772 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:26:11,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 23:26:11,772 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:11,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:11,773 INFO L82 PathProgramCache]: Analyzing trace with hash 754251087, now seen corresponding path program 7 times [2020-10-13 23:26:11,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:11,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100610764] [2020-10-13 23:26:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:11,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:11,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:12,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:12,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:12,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:12,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:13,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:16,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:16,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 23:26:16,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:26:16,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 23:26:16,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:16,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:16,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:26:16,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:26:16,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:26:16,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:16,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:26:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:16,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:16,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:16,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:26:16,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:26:16,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:26:16,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:16,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:16,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:26:16,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:26:16,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:26:16,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:26:16,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 23:26:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:16,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:16,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:17,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:26:17,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 23:26:17,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:26:17,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-13 23:26:17,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:26:17,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:26:17,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:26:17,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 23:26:17,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:26:17,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:26:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 23:26:17,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100610764] [2020-10-13 23:26:17,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:26:17,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:26:17,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342065518] [2020-10-13 23:26:17,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:26:17,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:26:17,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:26:17,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:26:17,434 INFO L87 Difference]: Start difference. First operand 357 states and 460 transitions. Second operand 14 states. [2020-10-13 23:26:18,836 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2020-10-13 23:26:21,238 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification that was a NOOP. DAG size: 49 [2020-10-13 23:26:21,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:21,812 INFO L93 Difference]: Finished difference Result 573 states and 744 transitions. [2020-10-13 23:26:21,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:26:21,813 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-13 23:26:21,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:21,815 INFO L225 Difference]: With dead ends: 573 [2020-10-13 23:26:21,815 INFO L226 Difference]: Without dead ends: 479 [2020-10-13 23:26:21,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:26:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2020-10-13 23:26:21,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 366. [2020-10-13 23:26:21,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2020-10-13 23:26:21,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 475 transitions. [2020-10-13 23:26:21,864 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 475 transitions. Word has length 56 [2020-10-13 23:26:21,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:21,864 INFO L479 AbstractCegarLoop]: Abstraction has 366 states and 475 transitions. [2020-10-13 23:26:21,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:26:21,864 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 475 transitions. [2020-10-13 23:26:21,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 23:26:21,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:21,866 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2020-10-13 23:26:21,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 23:26:21,866 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:21,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:21,867 INFO L82 PathProgramCache]: Analyzing trace with hash 500784211, now seen corresponding path program 3 times [2020-10-13 23:26:21,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:21,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341114974] [2020-10-13 23:26:21,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:21,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:21,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:21,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:24,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:24,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:24,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:24,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:25,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:25,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:25,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:25,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking...