/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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-crafted/zero_sum_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:43:47,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:43:47,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:43:47,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:43:47,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:43:47,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:43:47,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:43:47,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:43:47,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:43:47,239 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:43:47,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:43:47,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:43:47,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:43:47,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:43:47,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:43:47,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:43:47,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:43:47,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:43:47,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:43:47,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:43:47,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:43:47,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:43:47,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:43:47,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:43:47,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:43:47,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:43:47,287 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:43:47,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:43:47,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:43:47,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:43:47,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:43:47,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:43:47,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:43:47,295 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:43:47,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:43:47,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:43:47,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:43:47,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:43:47,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:43:47,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:43:47,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:43:47,305 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 17:43:47,350 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:43:47,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:43:47,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:43:47,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:43:47,353 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:43:47,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:43:47,354 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:43:47,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:43:47,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:43:47,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:43:47,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:43:47,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:43:47,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:43:47,356 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:43:47,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:43:47,357 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:43:47,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:43:47,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:43:47,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:43:47,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:43:47,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:43:47,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:43:47,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:43:47,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:43:47,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:43:47,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:43:47,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:43:47,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:43:47,360 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:43:47,360 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 17:43:47,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:43:47,707 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:43:47,711 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:43:47,713 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:43:47,714 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:43:47,715 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m2.c [2020-10-14 17:43:47,783 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8447f8666/6f637a1d9d64464e8a65fa37d193b75f/FLAG7d35129ad [2020-10-14 17:43:48,235 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:43:48,236 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_m2.c [2020-10-14 17:43:48,244 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8447f8666/6f637a1d9d64464e8a65fa37d193b75f/FLAG7d35129ad [2020-10-14 17:43:48,623 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8447f8666/6f637a1d9d64464e8a65fa37d193b75f [2020-10-14 17:43:48,632 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:43:48,634 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:43:48,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:43:48,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:43:48,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:43:48,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:43:48" (1/1) ... [2020-10-14 17:43:48,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dccfc7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:48, skipping insertion in model container [2020-10-14 17:43:48,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:43:48" (1/1) ... [2020-10-14 17:43:48,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:43:48,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:43:48,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:43:48,884 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:43:48,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:43:48,928 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:43:48,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:48 WrapperNode [2020-10-14 17:43:48,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:43:48,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:43:48,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:43:48,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:43:49,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:48" (1/1) ... [2020-10-14 17:43:49,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:48" (1/1) ... [2020-10-14 17:43:49,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:48" (1/1) ... [2020-10-14 17:43:49,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:48" (1/1) ... [2020-10-14 17:43:49,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:48" (1/1) ... [2020-10-14 17:43:49,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:48" (1/1) ... [2020-10-14 17:43:49,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:48" (1/1) ... [2020-10-14 17:43:49,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:43:49,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:43:49,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:43:49,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:43:49,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:43:49,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:43:49,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:43:49,133 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 17:43:49,133 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:43:49,133 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:43:49,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:43:49,135 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 17:43:49,135 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 17:43:49,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:43:49,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-14 17:43:49,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:43:49,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:43:49,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:43:49,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:43:49,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:43:49,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:43:49,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:43:49,440 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:43:49,440 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-14 17:43:49,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:43:49 BoogieIcfgContainer [2020-10-14 17:43:49,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:43:49,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:43:49,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:43:49,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:43:49,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:43:48" (1/3) ... [2020-10-14 17:43:49,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a9e12b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:43:49, skipping insertion in model container [2020-10-14 17:43:49,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:48" (2/3) ... [2020-10-14 17:43:49,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a9e12b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:43:49, skipping insertion in model container [2020-10-14 17:43:49,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:43:49" (3/3) ... [2020-10-14 17:43:49,457 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m2.c [2020-10-14 17:43:49,471 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:43:49,479 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:43:49,498 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:43:49,531 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:43:49,532 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:43:49,532 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:43:49,532 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:43:49,533 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:43:49,533 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:43:49,533 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:43:49,533 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:43:49,554 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-14 17:43:49,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 17:43:49,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:43:49,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:43:49,564 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:43:49,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:43:49,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1619448805, now seen corresponding path program 1 times [2020-10-14 17:43:49,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:43:49,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299827546] [2020-10-14 17:43:49,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:43:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:49,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:49,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:49,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:49,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:49,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:50,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:50,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:50,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 17:43:50,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:43:50,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1083 [2020-10-14 17:43:50,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:50,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:50,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:43:50,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:43:50,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 17:43:50,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 17:43:50,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:43:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:50,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:50,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:50,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:43:50,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:43:50,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 17:43:50,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:50,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:50,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:43:50,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:43:50,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:43:50,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:43:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:43:50,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299827546] [2020-10-14 17:43:50,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:43:50,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 17:43:50,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987987857] [2020-10-14 17:43:50,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:43:50,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:43:50,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:43:50,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:43:50,995 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 6 states. [2020-10-14 17:43:51,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:43:51,247 INFO L93 Difference]: Finished difference Result 75 states and 105 transitions. [2020-10-14 17:43:51,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:43:51,249 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 17:43:51,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:43:51,260 INFO L225 Difference]: With dead ends: 75 [2020-10-14 17:43:51,260 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 17:43:51,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:43:51,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 17:43:51,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-14 17:43:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 17:43:51,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-10-14 17:43:51,312 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2020-10-14 17:43:51,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:43:51,313 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-10-14 17:43:51,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:43:51,314 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-10-14 17:43:51,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 17:43:51,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:43:51,315 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] [2020-10-14 17:43:51,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:43:51,316 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:43:51,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:43:51,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1525042861, now seen corresponding path program 1 times [2020-10-14 17:43:51,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:43:51,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279050742] [2020-10-14 17:43:51,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:43:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:51,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:51,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:51,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:51,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:51,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:51,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:51,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:51,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:52,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:52,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 17:43:52,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:43:52,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1126 [2020-10-14 17:43:52,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:52,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:52,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:43:52,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:43:52,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 17:43:52,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:43:52,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:43:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:52,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:52,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:52,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:43:52,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:43:52,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:43:52,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:52,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:52,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:43:52,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:43:52,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:43:52,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:43:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:43:52,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279050742] [2020-10-14 17:43:52,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:43:52,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 17:43:52,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133180646] [2020-10-14 17:43:52,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:43:52,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:43:52,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:43:52,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:43:52,567 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-10-14 17:43:52,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:43:52,741 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2020-10-14 17:43:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:43:52,741 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-14 17:43:52,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:43:52,743 INFO L225 Difference]: With dead ends: 58 [2020-10-14 17:43:52,743 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 17:43:52,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:43:52,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 17:43:52,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-14 17:43:52,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 17:43:52,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-14 17:43:52,753 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2020-10-14 17:43:52,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:43:52,754 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-14 17:43:52,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:43:52,754 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-14 17:43:52,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 17:43:52,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:43:52,756 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] [2020-10-14 17:43:52,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:43:52,756 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:43:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:43:52,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1640283643, now seen corresponding path program 1 times [2020-10-14 17:43:52,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:43:52,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989776494] [2020-10-14 17:43:52,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:43:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:52,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:52,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:53,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:53,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:54,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:54,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:54,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:55,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:55,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:56,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:56,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:56,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:57,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:57,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 17:43:57,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 17:43:57,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 17:43:57,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:57,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:57,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 17:43:57,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:43:57,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 17:43:57,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:43:58,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:43:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:58,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:58,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:58,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:43:58,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:43:58,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:43:58,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:58,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:58,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:43:58,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:43:58,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:43:58,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:43:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:43:58,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989776494] [2020-10-14 17:43:58,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:43:58,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 17:43:58,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376106034] [2020-10-14 17:43:58,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 17:43:58,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:43:58,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 17:43:58,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:43:58,826 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 21 states. [2020-10-14 17:43:59,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:43:59,441 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2020-10-14 17:43:59,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:43:59,442 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 36 [2020-10-14 17:43:59,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:43:59,444 INFO L225 Difference]: With dead ends: 63 [2020-10-14 17:43:59,444 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 17:43:59,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:43:59,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 17:43:59,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-10-14 17:43:59,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 17:43:59,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-14 17:43:59,455 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 36 [2020-10-14 17:43:59,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:43:59,455 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-14 17:43:59,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 17:43:59,456 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-14 17:43:59,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 17:43:59,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:43:59,457 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 17:43:59,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:43:59,458 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:43:59,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:43:59,458 INFO L82 PathProgramCache]: Analyzing trace with hash 957569091, now seen corresponding path program 2 times [2020-10-14 17:43:59,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:43:59,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168901512] [2020-10-14 17:43:59,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:43:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:59,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:59,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:59,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:59,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:04,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:04,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 17:44:04,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:44:04,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 17:44:04,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:04,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:04,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:44:04,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:44:04,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 17:44:04,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 17:44:04,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:04,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:04,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:04,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:04,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:04,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:04,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:04,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:04,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:04,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:04,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:04,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 17:44:04,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168901512] [2020-10-14 17:44:04,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:04,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:44:04,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112535481] [2020-10-14 17:44:04,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:44:04,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:04,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:44:04,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:44:04,597 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 10 states. [2020-10-14 17:44:04,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:04,902 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2020-10-14 17:44:04,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:44:04,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-14 17:44:04,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:04,904 INFO L225 Difference]: With dead ends: 104 [2020-10-14 17:44:04,905 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 17:44:04,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:44:04,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 17:44:04,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-14 17:44:04,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 17:44:04,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-14 17:44:04,927 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 38 [2020-10-14 17:44:04,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:04,927 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-14 17:44:04,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:44:04,927 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-14 17:44:04,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 17:44:04,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:04,931 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 17:44:04,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:44:04,932 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:04,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:04,932 INFO L82 PathProgramCache]: Analyzing trace with hash 15558915, now seen corresponding path program 3 times [2020-10-14 17:44:04,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:04,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026623805] [2020-10-14 17:44:04,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:04,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:04,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:04,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:05,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:09,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:09,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 17:44:09,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:44:09,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 17:44:09,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:09,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:09,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:44:09,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:44:09,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 17:44:09,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:10,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:10,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:10,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:10,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:10,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:10,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:10,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:10,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:10,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:10,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:10,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:10,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 17:44:10,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026623805] [2020-10-14 17:44:10,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:10,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:44:10,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216456959] [2020-10-14 17:44:10,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:44:10,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:10,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:44:10,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:44:10,039 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 10 states. [2020-10-14 17:44:10,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:10,340 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-10-14 17:44:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:44:10,340 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-14 17:44:10,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:10,341 INFO L225 Difference]: With dead ends: 63 [2020-10-14 17:44:10,341 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 17:44:10,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:44:10,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 17:44:10,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-14 17:44:10,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 17:44:10,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-14 17:44:10,354 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 38 [2020-10-14 17:44:10,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:10,355 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-14 17:44:10,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:44:10,355 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-14 17:44:10,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 17:44:10,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:10,356 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:10,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:44:10,356 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:10,357 INFO L82 PathProgramCache]: Analyzing trace with hash 723988349, now seen corresponding path program 4 times [2020-10-14 17:44:10,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:10,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931143470] [2020-10-14 17:44:10,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:10,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:10,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:10,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:10,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:11,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:11,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:11,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:11,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:12,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:12,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:12,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:13,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:14,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:14,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:14,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:15,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:15,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 17:44:15,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 17:44:15,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 17:44:15,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:15,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:15,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 17:44:15,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:44:15,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 17:44:15,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:17,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:17,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:17,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:17,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:17,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:17,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:17,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:17,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:17,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:17,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:17,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:17,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:44:17,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931143470] [2020-10-14 17:44:17,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:17,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 17:44:17,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843194473] [2020-10-14 17:44:17,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 17:44:17,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:17,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 17:44:17,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=750, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:44:17,234 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 29 states. [2020-10-14 17:44:18,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:18,371 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2020-10-14 17:44:18,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 17:44:18,372 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 44 [2020-10-14 17:44:18,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:18,374 INFO L225 Difference]: With dead ends: 77 [2020-10-14 17:44:18,374 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 17:44:18,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:44:18,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 17:44:18,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2020-10-14 17:44:18,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 17:44:18,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-10-14 17:44:18,385 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 44 [2020-10-14 17:44:18,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:18,386 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-10-14 17:44:18,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 17:44:18,386 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-10-14 17:44:18,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 17:44:18,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:18,387 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:18,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:44:18,388 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:18,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:18,388 INFO L82 PathProgramCache]: Analyzing trace with hash 985253819, now seen corresponding path program 5 times [2020-10-14 17:44:18,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:18,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412748631] [2020-10-14 17:44:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:18,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:18,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:18,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:18,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:23,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:23,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 17:44:23,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:44:23,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 17:44:23,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:23,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:23,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:44:23,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:44:23,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 17:44:23,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:23,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:23,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:23,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:23,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:23,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:23,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:23,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:23,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:23,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-14 17:44:23,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412748631] [2020-10-14 17:44:23,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:23,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:44:23,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054001869] [2020-10-14 17:44:23,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:44:23,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:23,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:44:23,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:44:23,506 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 12 states. [2020-10-14 17:44:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:23,832 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2020-10-14 17:44:23,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:44:23,832 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-14 17:44:23,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:23,834 INFO L225 Difference]: With dead ends: 126 [2020-10-14 17:44:23,834 INFO L226 Difference]: Without dead ends: 79 [2020-10-14 17:44:23,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:44:23,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-14 17:44:23,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-14 17:44:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-14 17:44:23,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2020-10-14 17:44:23,845 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 46 [2020-10-14 17:44:23,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:23,845 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2020-10-14 17:44:23,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:44:23,845 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2020-10-14 17:44:23,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 17:44:23,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:23,847 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:23,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 17:44:23,847 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:23,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:23,847 INFO L82 PathProgramCache]: Analyzing trace with hash 3766395, now seen corresponding path program 6 times [2020-10-14 17:44:23,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:23,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261040251] [2020-10-14 17:44:23,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:23,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:23,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:23,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:24,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:28,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:28,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 17:44:28,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:44:28,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:44:28,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:28,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:28,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:44:28,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:44:28,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 17:44:28,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:28,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:28,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:28,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:28,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:28,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:28,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:28,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:28,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:28,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:28,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:28,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:28,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-14 17:44:28,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261040251] [2020-10-14 17:44:28,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:28,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:44:28,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169737781] [2020-10-14 17:44:28,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:44:28,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:28,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:44:28,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:44:28,962 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 12 states. [2020-10-14 17:44:29,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:29,292 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2020-10-14 17:44:29,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:44:29,292 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-14 17:44:29,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:29,294 INFO L225 Difference]: With dead ends: 75 [2020-10-14 17:44:29,294 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 17:44:29,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:44:29,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 17:44:29,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-14 17:44:29,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 17:44:29,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-14 17:44:29,303 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 46 [2020-10-14 17:44:29,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:29,304 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-14 17:44:29,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:44:29,304 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-14 17:44:29,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 17:44:29,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:29,305 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:29,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 17:44:29,305 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:29,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:29,306 INFO L82 PathProgramCache]: Analyzing trace with hash 775128309, now seen corresponding path program 7 times [2020-10-14 17:44:29,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:29,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170243165] [2020-10-14 17:44:29,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:29,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:29,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:29,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:30,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:30,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:30,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:31,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:32,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:32,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:32,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:33,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:33,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:33,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:34,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:34,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 17:44:34,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 17:44:34,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:44:34,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:34,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:34,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 17:44:34,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:44:34,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 17:44:34,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:36,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:36,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:36,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:36,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:36,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:36,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:36,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:36,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:36,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:36,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:36,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:36,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:44:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:44:36,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170243165] [2020-10-14 17:44:36,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:36,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 17:44:36,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802363116] [2020-10-14 17:44:36,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 17:44:36,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:36,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 17:44:36,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1186, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:44:36,142 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 36 states. [2020-10-14 17:44:37,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:37,538 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2020-10-14 17:44:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 17:44:37,538 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 52 [2020-10-14 17:44:37,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:37,540 INFO L225 Difference]: With dead ends: 91 [2020-10-14 17:44:37,540 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 17:44:37,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=84, Invalid=1322, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:44:37,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 17:44:37,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2020-10-14 17:44:37,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 17:44:37,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2020-10-14 17:44:37,552 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 52 [2020-10-14 17:44:37,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:37,552 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2020-10-14 17:44:37,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 17:44:37,553 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2020-10-14 17:44:37,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 17:44:37,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:37,554 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:37,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 17:44:37,554 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:37,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:37,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1408852173, now seen corresponding path program 8 times [2020-10-14 17:44:37,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:37,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946696666] [2020-10-14 17:44:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:37,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:37,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:37,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:37,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:42,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:42,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 17:44:42,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:44:42,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 17:44:42,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:42,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:42,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:44:42,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:44:42,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 17:44:42,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:42,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:42,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:42,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:42,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:42,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:42,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:42,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:42,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:42,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:42,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:42,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:42,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 17:44:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-14 17:44:42,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946696666] [2020-10-14 17:44:42,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:42,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:44:42,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182213878] [2020-10-14 17:44:42,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:44:42,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:42,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:44:42,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:44:42,698 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 14 states. [2020-10-14 17:44:43,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:43,070 INFO L93 Difference]: Finished difference Result 148 states and 161 transitions. [2020-10-14 17:44:43,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:44:43,070 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-14 17:44:43,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:43,071 INFO L225 Difference]: With dead ends: 148 [2020-10-14 17:44:43,071 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 17:44:43,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:44:43,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 17:44:43,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-14 17:44:43,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-14 17:44:43,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2020-10-14 17:44:43,096 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 54 [2020-10-14 17:44:43,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:43,097 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2020-10-14 17:44:43,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:44:43,100 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2020-10-14 17:44:43,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 17:44:43,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:43,102 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:43,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 17:44:43,102 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:43,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:43,102 INFO L82 PathProgramCache]: Analyzing trace with hash 744746995, now seen corresponding path program 9 times [2020-10-14 17:44:43,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:43,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531868270] [2020-10-14 17:44:43,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:43,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:43,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:43,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:43,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:48,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:48,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 17:44:48,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:44:48,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:44:48,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:48,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:48,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:44:48,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:44:48,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:44:48,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:48,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:48,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:48,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:48,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:48,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:48,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:48,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:48,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:48,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:48,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:48,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:48,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-14 17:44:48,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531868270] [2020-10-14 17:44:48,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:48,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:44:48,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119658732] [2020-10-14 17:44:48,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:44:48,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:48,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:44:48,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:44:48,251 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 14 states. [2020-10-14 17:44:48,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:48,736 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2020-10-14 17:44:48,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:44:48,736 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-14 17:44:48,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:48,738 INFO L225 Difference]: With dead ends: 87 [2020-10-14 17:44:48,738 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 17:44:48,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:44:48,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 17:44:48,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-14 17:44:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 17:44:48,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-14 17:44:48,747 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 54 [2020-10-14 17:44:48,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:48,748 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-14 17:44:48,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:44:48,748 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-14 17:44:48,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 17:44:48,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:48,749 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:48,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 17:44:48,750 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:48,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:48,750 INFO L82 PathProgramCache]: Analyzing trace with hash 97010285, now seen corresponding path program 10 times [2020-10-14 17:44:48,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:48,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820028119] [2020-10-14 17:44:48,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:48,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:48,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:49,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:49,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:50,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:51,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:51,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:52,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:53,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:53,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 17:44:53,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:44:53,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-14 17:44:53,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:53,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:53,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 17:44:53,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:44:53,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 17:44:53,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:58,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:58,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:58,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:58,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:58,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:58,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:58,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:58,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:58,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:58,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:58,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:58,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:44:58,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820028119] [2020-10-14 17:44:58,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:58,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 17:44:58,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275060633] [2020-10-14 17:44:58,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 17:44:58,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:58,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 17:44:58,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 17:44:58,907 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 49 states. [2020-10-14 17:44:59,113 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-10-14 17:44:59,984 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 84 [2020-10-14 17:45:00,214 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-14 17:45:00,413 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-14 17:45:00,709 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-10-14 17:45:01,284 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 120 [2020-10-14 17:45:01,548 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-14 17:45:02,097 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 103 [2020-10-14 17:45:02,534 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 101 [2020-10-14 17:45:03,002 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-14 17:45:03,248 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 17:45:03,482 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-14 17:45:03,674 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-14 17:45:04,217 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 80 [2020-10-14 17:45:04,597 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-14 17:45:05,254 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 121 [2020-10-14 17:45:05,797 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 113 [2020-10-14 17:45:06,102 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2020-10-14 17:45:06,419 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2020-10-14 17:45:06,660 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-14 17:45:07,697 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 134 [2020-10-14 17:45:08,234 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2020-10-14 17:45:08,554 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-10-14 17:45:10,997 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2020-10-14 17:45:11,297 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-10-14 17:45:11,628 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-14 17:45:11,902 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 48 [2020-10-14 17:45:12,323 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 82 [2020-10-14 17:45:12,742 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 81 [2020-10-14 17:45:13,167 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 82 [2020-10-14 17:45:13,756 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 74 [2020-10-14 17:45:14,245 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 71 [2020-10-14 17:45:14,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:14,581 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2020-10-14 17:45:14,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-14 17:45:14,581 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 60 [2020-10-14 17:45:14,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:14,582 INFO L225 Difference]: With dead ends: 111 [2020-10-14 17:45:14,583 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 17:45:14,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=998, Invalid=6657, Unknown=1, NotChecked=0, Total=7656 [2020-10-14 17:45:14,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 17:45:14,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2020-10-14 17:45:14,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 17:45:14,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2020-10-14 17:45:14,597 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 60 [2020-10-14 17:45:14,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:14,598 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2020-10-14 17:45:14,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 17:45:14,598 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2020-10-14 17:45:14,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 17:45:14,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:14,599 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:14,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 17:45:14,600 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:14,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:14,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1608610069, now seen corresponding path program 11 times [2020-10-14 17:45:14,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:14,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981507687] [2020-10-14 17:45:14,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:14,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:14,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:14,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:17,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:19,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:19,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 17:45:19,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:45:19,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 17:45:19,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:19,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:19,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:45:19,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:45:19,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 17:45:19,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:45:19,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:19,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:19,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:19,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:19,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:19,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:19,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:19,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:19,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:19,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:19,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:19,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-14 17:45:19,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981507687] [2020-10-14 17:45:19,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:19,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:45:19,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406285463] [2020-10-14 17:45:19,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:45:19,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:19,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:45:19,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:45:19,791 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand 16 states. [2020-10-14 17:45:20,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:20,369 INFO L93 Difference]: Finished difference Result 158 states and 170 transitions. [2020-10-14 17:45:20,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:45:20,370 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-10-14 17:45:20,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:20,372 INFO L225 Difference]: With dead ends: 158 [2020-10-14 17:45:20,372 INFO L226 Difference]: Without dead ends: 103 [2020-10-14 17:45:20,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:45:20,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-14 17:45:20,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-14 17:45:20,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-14 17:45:20,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2020-10-14 17:45:20,385 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 62 [2020-10-14 17:45:20,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:20,385 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2020-10-14 17:45:20,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:45:20,385 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2020-10-14 17:45:20,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 17:45:20,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:20,387 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:20,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 17:45:20,387 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:20,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:20,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1171574635, now seen corresponding path program 12 times [2020-10-14 17:45:20,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:20,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101785586] [2020-10-14 17:45:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:20,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:20,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:20,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:22,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:25,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:25,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 17:45:25,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:45:25,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 17:45:25,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:25,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:25,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:45:25,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:45:25,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 17:45:25,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:25,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:25,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:25,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:25,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:25,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:25,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:45:25,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:25,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:25,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:25,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:25,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:25,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:45:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-14 17:45:25,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101785586] [2020-10-14 17:45:25,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:25,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:45:25,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749380979] [2020-10-14 17:45:25,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:45:25,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:25,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:45:25,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:45:25,650 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand 16 states. [2020-10-14 17:45:26,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:26,622 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2020-10-14 17:45:26,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 17:45:26,623 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-10-14 17:45:26,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:26,624 INFO L225 Difference]: With dead ends: 99 [2020-10-14 17:45:26,624 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 17:45:26,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:45:26,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 17:45:26,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-14 17:45:26,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 17:45:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-14 17:45:26,645 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 62 [2020-10-14 17:45:26,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:26,645 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-14 17:45:26,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:45:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-14 17:45:26,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 17:45:26,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:26,649 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:26,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 17:45:26,649 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:26,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:26,650 INFO L82 PathProgramCache]: Analyzing trace with hash 441280485, now seen corresponding path program 13 times [2020-10-14 17:45:26,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:26,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345494319] [2020-10-14 17:45:26,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:26,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:26,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:27,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:28,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:28,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:29,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:30,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:31,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:31,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:31,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 17:45:31,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:45:31,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 17:45:31,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:31,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:31,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-14 17:45:31,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:45:31,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-14 17:45:31,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:38,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:38,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:38,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:38,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:38,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:38,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:38,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:38,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:38,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:38,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:38,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:38,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:45:38,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345494319] [2020-10-14 17:45:38,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:38,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-14 17:45:38,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445251462] [2020-10-14 17:45:38,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-14 17:45:38,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:38,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-14 17:45:38,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2545, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 17:45:38,951 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 52 states. [2020-10-14 17:45:43,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:43,541 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2020-10-14 17:45:43,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 17:45:43,542 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 68 [2020-10-14 17:45:43,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:43,543 INFO L225 Difference]: With dead ends: 119 [2020-10-14 17:45:43,544 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 17:45:43,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=117, Invalid=2745, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 17:45:43,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 17:45:43,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 103. [2020-10-14 17:45:43,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 17:45:43,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2020-10-14 17:45:43,561 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 68 [2020-10-14 17:45:43,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:43,561 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2020-10-14 17:45:43,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-14 17:45:43,561 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2020-10-14 17:45:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 17:45:43,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:43,563 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:43,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 17:45:43,563 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:43,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:43,563 INFO L82 PathProgramCache]: Analyzing trace with hash -114063837, now seen corresponding path program 14 times [2020-10-14 17:45:43,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:43,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134706334] [2020-10-14 17:45:43,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:43,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:43,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:43,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:43,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:48,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:48,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 17:45:48,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:45:48,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 17:45:48,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:48,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:48,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:45:48,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:45:48,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 17:45:48,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:48,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:48,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:48,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:48,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:48,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:48,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:45:48,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:48,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:48,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:48,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:48,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:48,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:45:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-14 17:45:48,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134706334] [2020-10-14 17:45:48,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:48,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:45:48,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553086956] [2020-10-14 17:45:48,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:45:48,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:48,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:45:48,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:45:48,866 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand 18 states. [2020-10-14 17:45:49,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:49,795 INFO L93 Difference]: Finished difference Result 192 states and 205 transitions. [2020-10-14 17:45:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:45:49,796 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-10-14 17:45:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:49,797 INFO L225 Difference]: With dead ends: 192 [2020-10-14 17:45:49,797 INFO L226 Difference]: Without dead ends: 115 [2020-10-14 17:45:49,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:45:49,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-14 17:45:49,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-10-14 17:45:49,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-14 17:45:49,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2020-10-14 17:45:49,811 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 70 [2020-10-14 17:45:49,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:49,812 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2020-10-14 17:45:49,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:45:49,812 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2020-10-14 17:45:49,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 17:45:49,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:49,813 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:49,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 17:45:49,813 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:49,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:49,813 INFO L82 PathProgramCache]: Analyzing trace with hash 385095395, now seen corresponding path program 15 times [2020-10-14 17:45:49,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:49,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628892756] [2020-10-14 17:45:49,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:49,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:49,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:49,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:52,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:54,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:54,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 17:45:54,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:45:54,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:45:54,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:54,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:54,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:45:54,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:45:54,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 17:45:54,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:55,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:55,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:55,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:55,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:55,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:55,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:55,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:55,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:55,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:55,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:55,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:55,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:45:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-14 17:45:55,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628892756] [2020-10-14 17:45:55,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:55,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:45:55,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401429565] [2020-10-14 17:45:55,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:45:55,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:55,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:45:55,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:45:55,132 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand 18 states. [2020-10-14 17:45:56,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:56,060 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2020-10-14 17:45:56,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:45:56,061 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-10-14 17:45:56,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:56,062 INFO L225 Difference]: With dead ends: 111 [2020-10-14 17:45:56,062 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 17:45:56,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:45:56,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 17:45:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-14 17:45:56,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 17:45:56,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-14 17:45:56,072 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 70 [2020-10-14 17:45:56,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:56,072 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-14 17:45:56,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:45:56,073 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-14 17:45:56,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 17:45:56,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:56,073 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:45:56,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 17:45:56,074 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:56,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:56,074 INFO L82 PathProgramCache]: Analyzing trace with hash -567610019, now seen corresponding path program 16 times [2020-10-14 17:45:56,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:56,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258787071] [2020-10-14 17:45:56,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:56,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:56,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:57,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:58,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:59,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:00,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:01,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:01,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:01,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 17:46:01,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:46:01,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5479 [2020-10-14 17:46:01,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:01,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:01,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-14 17:46:01,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:46:01,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 17:46:01,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:04,614 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-14 17:46:04,866 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-14 17:46:12,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:12,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:12,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:12,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:12,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:12,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:12,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:12,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:12,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:12,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:12,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:12,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:46:12,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258787071] [2020-10-14 17:46:12,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:12,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-14 17:46:12,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355869895] [2020-10-14 17:46:12,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-14 17:46:12,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:12,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-14 17:46:12,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=3647, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 17:46:12,486 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 62 states. [2020-10-14 17:46:14,955 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-14 17:46:15,556 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-14 17:46:16,143 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-14 17:46:17,640 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-14 17:46:18,046 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-14 17:46:18,867 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-14 17:46:19,475 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-14 17:46:20,059 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-14 17:46:20,667 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-14 17:46:21,261 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-14 17:46:21,884 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-14 17:46:23,809 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 131 DAG size of output: 122 [2020-10-14 17:46:24,897 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-14 17:46:25,630 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-14 17:46:26,303 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-14 17:46:26,965 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-14 17:46:27,543 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-14 17:46:29,633 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-14 17:46:30,336 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-14 17:46:30,966 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-14 17:46:31,575 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-14 17:46:32,156 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-14 17:46:32,730 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-14 17:46:34,483 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-14 17:46:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:35,367 INFO L93 Difference]: Finished difference Result 137 states and 144 transitions. [2020-10-14 17:46:35,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-14 17:46:35,370 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 76 [2020-10-14 17:46:35,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:35,372 INFO L225 Difference]: With dead ends: 137 [2020-10-14 17:46:35,372 INFO L226 Difference]: Without dead ends: 132 [2020-10-14 17:46:35,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=361, Invalid=8759, Unknown=0, NotChecked=0, Total=9120 [2020-10-14 17:46:35,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-14 17:46:35,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 115. [2020-10-14 17:46:35,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-14 17:46:35,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 122 transitions. [2020-10-14 17:46:35,388 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 122 transitions. Word has length 76 [2020-10-14 17:46:35,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:35,388 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 122 transitions. [2020-10-14 17:46:35,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-14 17:46:35,388 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 122 transitions. [2020-10-14 17:46:35,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 17:46:35,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:35,389 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:35,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 17:46:35,389 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:35,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:35,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1004770715, now seen corresponding path program 17 times [2020-10-14 17:46:35,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:35,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270304750] [2020-10-14 17:46:35,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:35,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:35,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:35,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:35,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:40,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:40,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 17:46:40,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:46:40,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:46:40,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:40,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:40,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 17:46:40,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:46:40,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 17:46:40,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:40,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:40,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:40,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:40,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:40,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:40,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:40,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:40,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:40,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:40,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:40,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:40,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-14 17:46:40,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270304750] [2020-10-14 17:46:40,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:40,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 17:46:40,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402065822] [2020-10-14 17:46:40,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 17:46:40,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:40,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 17:46:40,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:46:40,852 INFO L87 Difference]: Start difference. First operand 115 states and 122 transitions. Second operand 20 states. [2020-10-14 17:46:42,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:42,296 INFO L93 Difference]: Finished difference Result 214 states and 227 transitions. [2020-10-14 17:46:42,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 17:46:42,298 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2020-10-14 17:46:42,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:42,300 INFO L225 Difference]: With dead ends: 214 [2020-10-14 17:46:42,300 INFO L226 Difference]: Without dead ends: 127 [2020-10-14 17:46:42,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:46:42,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-14 17:46:42,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 116. [2020-10-14 17:46:42,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-14 17:46:42,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 122 transitions. [2020-10-14 17:46:42,314 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 122 transitions. Word has length 78 [2020-10-14 17:46:42,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:42,314 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 122 transitions. [2020-10-14 17:46:42,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 17:46:42,315 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 122 transitions. [2020-10-14 17:46:42,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 17:46:42,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:42,316 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:42,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 17:46:42,316 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:42,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:42,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1948894811, now seen corresponding path program 18 times [2020-10-14 17:46:42,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:42,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056584722] [2020-10-14 17:46:42,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:42,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:42,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:42,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:46,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:47,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:47,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 17:46:47,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:46:47,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 17:46:47,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:47,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:47,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 17:46:47,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:46:47,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 17:46:47,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:47,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:47,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:47,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:47,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:47,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:47,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:47,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:47,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:47,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:47,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:47,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:47,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:46:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-14 17:46:47,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056584722] [2020-10-14 17:46:47,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:47,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 17:46:47,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497050346] [2020-10-14 17:46:47,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 17:46:47,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:47,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 17:46:47,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:46:47,927 INFO L87 Difference]: Start difference. First operand 116 states and 122 transitions. Second operand 20 states. [2020-10-14 17:46:49,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:46:49,955 INFO L93 Difference]: Finished difference Result 123 states and 129 transitions. [2020-10-14 17:46:49,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 17:46:49,956 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2020-10-14 17:46:49,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:46:49,958 INFO L225 Difference]: With dead ends: 123 [2020-10-14 17:46:49,958 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 17:46:49,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:46:49,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 17:46:49,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-14 17:46:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-14 17:46:49,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-14 17:46:49,971 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 78 [2020-10-14 17:46:49,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:46:49,971 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-14 17:46:49,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 17:46:49,972 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-14 17:46:49,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 17:46:49,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:46:49,973 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:46:49,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 17:46:49,974 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:46:49,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:46:49,974 INFO L82 PathProgramCache]: Analyzing trace with hash -842470699, now seen corresponding path program 19 times [2020-10-14 17:46:49,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:46:49,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141620389] [2020-10-14 17:46:49,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:46:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:49,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:50,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:51,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:53,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:54,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:54,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 17:46:54,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:46:54,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 17:46:54,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:54,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:54,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-14 17:46:54,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:46:54,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-14 17:46:54,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:55,597 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2020-10-14 17:46:55,743 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2020-10-14 17:46:55,910 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2020-10-14 17:46:56,061 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2020-10-14 17:46:56,223 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2020-10-14 17:46:56,383 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2020-10-14 17:46:56,536 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-10-14 17:46:58,297 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-10-14 17:46:58,559 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-10-14 17:46:58,828 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-14 17:46:59,098 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-14 17:46:59,345 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-14 17:46:59,650 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-14 17:46:59,947 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-14 17:47:00,229 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-14 17:47:00,518 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-14 17:47:00,811 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-14 17:47:01,141 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-14 17:47:01,486 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-14 17:47:01,824 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-14 17:47:02,147 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-10-14 17:47:02,552 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-14 17:47:03,412 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-14 17:47:03,973 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-14 17:47:04,482 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-14 17:47:04,995 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-14 17:47:05,502 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-14 17:47:05,999 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-10-14 17:47:06,507 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-14 17:47:07,039 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-14 17:47:07,527 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-14 17:47:08,039 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-14 17:47:08,529 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-14 17:47:09,030 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-10-14 17:47:09,513 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-10-14 17:47:20,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:20,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:20,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:20,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:20,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:20,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:20,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:20,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:20,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:20,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:20,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:20,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:47:20,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141620389] [2020-10-14 17:47:20,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:20,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-14 17:47:20,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694702806] [2020-10-14 17:47:20,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-14 17:47:20,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:20,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-14 17:47:20,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=4960, Unknown=0, NotChecked=0, Total=5112 [2020-10-14 17:47:20,813 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 72 states. [2020-10-14 17:47:22,622 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-14 17:47:23,696 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-14 17:47:24,600 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-14 17:47:25,657 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-14 17:47:26,593 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-14 17:47:27,656 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-10-14 17:47:28,635 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-14 17:47:29,872 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-10-14 17:47:30,481 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-14 17:47:31,523 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-14 17:47:32,759 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-14 17:47:33,934 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-14 17:47:34,983 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-14 17:47:36,097 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-14 17:47:37,152 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-14 17:47:38,221 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-14 17:47:39,207 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 67