/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-examples/standard_copy5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:51:41,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:51:41,123 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:51:41,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:51:41,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:51:41,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:51:41,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:51:41,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:51:41,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:51:41,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:51:41,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:51:41,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:51:41,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:51:41,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:51:41,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:51:41,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:51:41,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:51:41,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:51:41,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:51:41,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:51:41,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:51:41,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:51:41,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:51:41,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:51:41,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:51:41,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:51:41,199 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:51:41,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:51:41,204 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:51:41,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:51:41,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:51:41,206 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:51:41,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:51:41,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:51:41,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:51:41,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:51:41,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:51:41,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:51:41,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:51:41,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:51:41,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:51:41,223 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 17:51:41,264 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:51:41,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:51:41,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:51:41,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:51:41,267 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:51:41,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:51:41,267 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:51:41,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:51:41,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:51:41,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:51:41,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:51:41,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:51:41,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:51:41,270 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:51:41,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:51:41,270 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:51:41,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:51:41,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:51:41,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:51:41,271 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:51:41,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:51:41,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:51:41,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:51:41,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:51:41,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:51:41,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:51:41,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:51:41,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:51:41,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:51:41,273 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 17:51:41,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:51:41,591 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:51:41,595 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:51:41,596 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:51:41,597 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:51:41,598 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2020-10-14 17:51:41,672 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8cb22ed8/37820d21499e46879d1aee1d5ee6df8f/FLAGb2ea9ac3d [2020-10-14 17:51:42,157 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:51:42,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2020-10-14 17:51:42,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8cb22ed8/37820d21499e46879d1aee1d5ee6df8f/FLAGb2ea9ac3d [2020-10-14 17:51:42,548 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8cb22ed8/37820d21499e46879d1aee1d5ee6df8f [2020-10-14 17:51:42,558 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:51:42,560 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:51:42,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:51:42,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:51:42,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:51:42,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:51:42" (1/1) ... [2020-10-14 17:51:42,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b2939e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:42, skipping insertion in model container [2020-10-14 17:51:42,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:51:42" (1/1) ... [2020-10-14 17:51:42,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:51:42,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:51:42,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:51:42,858 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:51:42,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:51:42,905 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:51:42,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:42 WrapperNode [2020-10-14 17:51:42,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:51:42,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:51:42,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:51:42,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:51:43,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:42" (1/1) ... [2020-10-14 17:51:43,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:42" (1/1) ... [2020-10-14 17:51:43,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:42" (1/1) ... [2020-10-14 17:51:43,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:42" (1/1) ... [2020-10-14 17:51:43,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:42" (1/1) ... [2020-10-14 17:51:43,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:42" (1/1) ... [2020-10-14 17:51:43,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:42" (1/1) ... [2020-10-14 17:51:43,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:51:43,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:51:43,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:51:43,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:51:43,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:42" (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 17:51:43,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:51:43,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:51:43,119 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:51:43,120 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:51:43,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:51:43,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:51:43,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 17:51:43,120 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:51:43,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:51:43,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:51:43,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:51:43,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:51:43,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:51:43,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:51:43,526 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:51:43,527 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-14 17:51:43,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:51:43 BoogieIcfgContainer [2020-10-14 17:51:43,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:51:43,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:51:43,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:51:43,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:51:43,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:51:42" (1/3) ... [2020-10-14 17:51:43,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7766bf6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:51:43, skipping insertion in model container [2020-10-14 17:51:43,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:42" (2/3) ... [2020-10-14 17:51:43,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7766bf6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:51:43, skipping insertion in model container [2020-10-14 17:51:43,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:51:43" (3/3) ... [2020-10-14 17:51:43,541 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2020-10-14 17:51:43,552 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:51:43,560 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:51:43,576 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:51:43,600 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:51:43,600 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:51:43,600 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:51:43,600 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:51:43,601 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:51:43,601 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:51:43,601 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:51:43,601 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:51:43,618 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-14 17:51:43,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 17:51:43,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:43,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:43,626 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:43,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:43,632 INFO L82 PathProgramCache]: Analyzing trace with hash -2095174276, now seen corresponding path program 1 times [2020-10-14 17:51:43,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:43,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750861562] [2020-10-14 17:51:43,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:43,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:43,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:43,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:43,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:44,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:44,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:45,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:45,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 17:51:45,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:51:45,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1469 [2020-10-14 17:51:45,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:45,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:45,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:51:45,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 17:51:45,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:51:45,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 17:51:45,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:45,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:45,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:45,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:45,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:45,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 17:51:45,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:45,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:45,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:45,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:45,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:45,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:51:45,356 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 17:51:45,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750861562] [2020-10-14 17:51:45,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:51:45,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 17:51:45,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322918881] [2020-10-14 17:51:45,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 17:51:45,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:45,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 17:51:45,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:51:45,394 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 4 states. [2020-10-14 17:51:45,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:45,600 INFO L93 Difference]: Finished difference Result 80 states and 117 transitions. [2020-10-14 17:51:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 17:51:45,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-14 17:51:45,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:45,612 INFO L225 Difference]: With dead ends: 80 [2020-10-14 17:51:45,612 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 17:51:45,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:51:45,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 17:51:45,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-10-14 17:51:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 17:51:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-14 17:51:45,674 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 23 [2020-10-14 17:51:45,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:45,675 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-14 17:51:45,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 17:51:45,676 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-14 17:51:45,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 17:51:45,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:45,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:45,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:51:45,681 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:45,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:45,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1810379444, now seen corresponding path program 1 times [2020-10-14 17:51:45,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:45,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627746003] [2020-10-14 17:51:45,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:45,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:45,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:45,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:45,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:45,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:46,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:50,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:50,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 17:51:50,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:51:50,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:51:50,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:50,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:50,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:51:50,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 17:51:50,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 17:51:50,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:51:50,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:50,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:50,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:50,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:50,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:50,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:51:50,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:50,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:50,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:50,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:50,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:50,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-14 17:51:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 17:51:50,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627746003] [2020-10-14 17:51:50,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:50,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 17:51:50,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603772228] [2020-10-14 17:51:50,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 17:51:50,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:50,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 17:51:50,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:51:50,812 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 5 states. [2020-10-14 17:51:51,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:51,038 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-10-14 17:51:51,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 17:51:51,038 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-14 17:51:51,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:51,040 INFO L225 Difference]: With dead ends: 81 [2020-10-14 17:51:51,040 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 17:51:51,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:51:51,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 17:51:51,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-10-14 17:51:51,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 17:51:51,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-14 17:51:51,063 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 33 [2020-10-14 17:51:51,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:51,063 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-14 17:51:51,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 17:51:51,064 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-14 17:51:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 17:51:51,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:51,069 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:51,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:51:51,070 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:51,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1571360162, now seen corresponding path program 2 times [2020-10-14 17:51:51,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:51,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116557083] [2020-10-14 17:51:51,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:51,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:51,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:51,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:51,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:51,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:56,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:56,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:56,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 17:51:56,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:51:56,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:51:56,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:56,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:56,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:51:56,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:51:56,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:51:56,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:51:56,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:56,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:56,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:56,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:56,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:56,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:56,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:51:56,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:56,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:56,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:56,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:56,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:56,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:51:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 17:51:56,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116557083] [2020-10-14 17:51:56,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:56,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 17:51:56,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039656740] [2020-10-14 17:51:56,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:51:56,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:56,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:51:56,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:51:56,154 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 6 states. [2020-10-14 17:51:56,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:56,340 INFO L93 Difference]: Finished difference Result 99 states and 114 transitions. [2020-10-14 17:51:56,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 17:51:56,340 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-14 17:51:56,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:56,342 INFO L225 Difference]: With dead ends: 99 [2020-10-14 17:51:56,342 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 17:51:56,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:51:56,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 17:51:56,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-10-14 17:51:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 17:51:56,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-10-14 17:51:56,360 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 43 [2020-10-14 17:51:56,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:56,360 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-10-14 17:51:56,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:51:56,361 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-10-14 17:51:56,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 17:51:56,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:56,363 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2020-10-14 17:51:56,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:51:56,364 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:56,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:56,364 INFO L82 PathProgramCache]: Analyzing trace with hash 2002852472, now seen corresponding path program 3 times [2020-10-14 17:51:56,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:56,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223149530] [2020-10-14 17:51:56,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:56,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:56,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:56,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:56,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:56,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:01,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:01,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 17:52:01,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:01,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 17:52:01,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:01,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:01,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 17:52:01,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 17:52:01,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 17:52:01,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:01,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:01,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:01,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:01,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:01,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:01,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:52:01,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:01,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:01,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:01,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:01,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:01,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 17:52:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 17:52:01,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223149530] [2020-10-14 17:52:01,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:01,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 17:52:01,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200391717] [2020-10-14 17:52:01,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 17:52:01,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:01,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 17:52:01,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:52:01,484 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 7 states. [2020-10-14 17:52:01,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:01,794 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2020-10-14 17:52:01,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:52:01,794 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-14 17:52:01,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:01,795 INFO L225 Difference]: With dead ends: 117 [2020-10-14 17:52:01,796 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 17:52:01,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 17:52:01,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 17:52:01,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2020-10-14 17:52:01,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 17:52:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-10-14 17:52:01,814 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 53 [2020-10-14 17:52:01,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:01,815 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-10-14 17:52:01,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 17:52:01,815 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-10-14 17:52:01,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 17:52:01,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:01,819 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1] [2020-10-14 17:52:01,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:52:01,820 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:01,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:01,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1230132174, now seen corresponding path program 4 times [2020-10-14 17:52:01,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:01,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713902801] [2020-10-14 17:52:01,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:01,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:01,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:01,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:01,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:02,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:06,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:06,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 17:52:06,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:06,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 17:52:06,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:06,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:06,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 17:52:06,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:52:06,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 17:52:06,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:06,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:06,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:06,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:06,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:06,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:06,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:52:06,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:06,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:06,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:06,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:06,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:06,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 17:52:06,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713902801] [2020-10-14 17:52:06,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:06,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 17:52:06,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032895776] [2020-10-14 17:52:06,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 17:52:06,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:06,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 17:52:06,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:52:06,963 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 8 states. [2020-10-14 17:52:07,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:07,297 INFO L93 Difference]: Finished difference Result 135 states and 150 transitions. [2020-10-14 17:52:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 17:52:07,297 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-10-14 17:52:07,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:07,299 INFO L225 Difference]: With dead ends: 135 [2020-10-14 17:52:07,299 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 17:52:07,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:52:07,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 17:52:07,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2020-10-14 17:52:07,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 17:52:07,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2020-10-14 17:52:07,318 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 63 [2020-10-14 17:52:07,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:07,318 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2020-10-14 17:52:07,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 17:52:07,319 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2020-10-14 17:52:07,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 17:52:07,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:07,321 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1] [2020-10-14 17:52:07,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:52:07,322 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:07,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:07,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1642653276, now seen corresponding path program 5 times [2020-10-14 17:52:07,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:07,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726016138] [2020-10-14 17:52:07,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:07,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:07,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:07,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:07,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:08,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:12,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:12,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 17:52:12,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:12,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:52:12,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:12,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:12,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 17:52:12,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 17:52:12,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 17:52:12,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:12,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:12,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:12,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:12,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:12,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:12,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:52:12,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:12,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:12,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:12,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:12,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:12,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 17:52:12,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726016138] [2020-10-14 17:52:12,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:12,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 17:52:12,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060540605] [2020-10-14 17:52:12,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 17:52:12,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:12,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 17:52:12,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:52:12,443 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand 9 states. [2020-10-14 17:52:12,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:12,673 INFO L93 Difference]: Finished difference Result 153 states and 168 transitions. [2020-10-14 17:52:12,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 17:52:12,674 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 73 [2020-10-14 17:52:12,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:12,675 INFO L225 Difference]: With dead ends: 153 [2020-10-14 17:52:12,675 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 17:52:12,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:52:12,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 17:52:12,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2020-10-14 17:52:12,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 17:52:12,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2020-10-14 17:52:12,685 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 73 [2020-10-14 17:52:12,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:12,685 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2020-10-14 17:52:12,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 17:52:12,686 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2020-10-14 17:52:12,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-14 17:52:12,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:12,687 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1] [2020-10-14 17:52:12,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:52:12,688 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:12,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:12,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1731081222, now seen corresponding path program 6 times [2020-10-14 17:52:12,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:12,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091208115] [2020-10-14 17:52:12,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:12,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:12,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:12,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:12,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:14,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:17,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:17,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 17:52:17,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:17,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 17:52:17,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:17,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:17,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:52:17,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-14 17:52:17,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 17:52:17,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:17,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:17,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:17,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:17,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:17,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:17,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:17,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:17,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:17,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:17,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:17,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:17,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-14 17:52:17,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091208115] [2020-10-14 17:52:17,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:17,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:52:17,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702143997] [2020-10-14 17:52:17,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:52:17,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:17,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:52:17,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:52:17,832 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand 10 states. [2020-10-14 17:52:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:18,134 INFO L93 Difference]: Finished difference Result 171 states and 186 transitions. [2020-10-14 17:52:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 17:52:18,135 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2020-10-14 17:52:18,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:18,136 INFO L225 Difference]: With dead ends: 171 [2020-10-14 17:52:18,136 INFO L226 Difference]: Without dead ends: 104 [2020-10-14 17:52:18,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:52:18,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-14 17:52:18,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2020-10-14 17:52:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 17:52:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 105 transitions. [2020-10-14 17:52:18,151 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 105 transitions. Word has length 83 [2020-10-14 17:52:18,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:18,152 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 105 transitions. [2020-10-14 17:52:18,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:52:18,152 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 105 transitions. [2020-10-14 17:52:18,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-14 17:52:18,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:18,154 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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, 1, 1, 1] [2020-10-14 17:52:18,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 17:52:18,154 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:18,154 INFO L82 PathProgramCache]: Analyzing trace with hash 724355792, now seen corresponding path program 7 times [2020-10-14 17:52:18,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:18,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553461712] [2020-10-14 17:52:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:18,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:18,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:18,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:18,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:20,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:23,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:23,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 17:52:23,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:23,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 17:52:23,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:23,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:23,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:52:23,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 17:52:23,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 17:52:23,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:23,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:23,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:23,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:23,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:23,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:23,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:23,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:23,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:23,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:23,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:23,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:23,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-14 17:52:23,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553461712] [2020-10-14 17:52:23,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:23,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:52:23,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598178066] [2020-10-14 17:52:23,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:52:23,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:23,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:52:23,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:52:23,295 INFO L87 Difference]: Start difference. First operand 99 states and 105 transitions. Second operand 11 states. [2020-10-14 17:52:23,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:23,587 INFO L93 Difference]: Finished difference Result 189 states and 204 transitions. [2020-10-14 17:52:23,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 17:52:23,587 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 93 [2020-10-14 17:52:23,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:23,588 INFO L225 Difference]: With dead ends: 189 [2020-10-14 17:52:23,588 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 17:52:23,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:52:23,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 17:52:23,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2020-10-14 17:52:23,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 17:52:23,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2020-10-14 17:52:23,617 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 93 [2020-10-14 17:52:23,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:23,618 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2020-10-14 17:52:23,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:52:23,618 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2020-10-14 17:52:23,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-14 17:52:23,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:23,620 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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, 1, 1, 1] [2020-10-14 17:52:23,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 17:52:23,620 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:23,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:23,621 INFO L82 PathProgramCache]: Analyzing trace with hash 190477862, now seen corresponding path program 8 times [2020-10-14 17:52:23,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:23,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973757520] [2020-10-14 17:52:23,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:23,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:23,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:23,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:23,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:28,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:28,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-14 17:52:28,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:52:28,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 17:52:28,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:28,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:28,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:52:28,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:52:28,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 17:52:28,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:28,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:28,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:28,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:28,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:28,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:28,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:28,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:28,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:28,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:28,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:28,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:28,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-14 17:52:28,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973757520] [2020-10-14 17:52:28,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:28,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:52:28,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427936098] [2020-10-14 17:52:28,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:52:28,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:28,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:52:28,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:52:28,769 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand 12 states. [2020-10-14 17:52:29,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:29,165 INFO L93 Difference]: Finished difference Result 207 states and 222 transitions. [2020-10-14 17:52:29,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:52:29,166 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 103 [2020-10-14 17:52:29,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:29,167 INFO L225 Difference]: With dead ends: 207 [2020-10-14 17:52:29,168 INFO L226 Difference]: Without dead ends: 124 [2020-10-14 17:52:29,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:52:29,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-14 17:52:29,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2020-10-14 17:52:29,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 17:52:29,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 125 transitions. [2020-10-14 17:52:29,177 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 125 transitions. Word has length 103 [2020-10-14 17:52:29,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:29,177 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 125 transitions. [2020-10-14 17:52:29,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:52:29,177 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 125 transitions. [2020-10-14 17:52:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-14 17:52:29,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:29,179 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:29,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 17:52:29,180 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:29,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:29,180 INFO L82 PathProgramCache]: Analyzing trace with hash 706031100, now seen corresponding path program 9 times [2020-10-14 17:52:29,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:29,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075246599] [2020-10-14 17:52:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:29,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:29,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:29,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:29,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:34,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:34,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:34,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 17:52:34,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:34,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 17:52:34,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:34,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:34,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:52:34,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-14 17:52:34,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 17:52:34,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:34,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:34,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:34,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:34,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:34,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:34,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:34,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:34,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:34,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:34,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:34,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:34,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-14 17:52:34,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075246599] [2020-10-14 17:52:34,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:34,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:52:34,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042787660] [2020-10-14 17:52:34,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:52:34,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:34,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:52:34,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:52:34,375 INFO L87 Difference]: Start difference. First operand 119 states and 125 transitions. Second operand 13 states. [2020-10-14 17:52:34,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:34,700 INFO L93 Difference]: Finished difference Result 225 states and 240 transitions. [2020-10-14 17:52:34,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:52:34,700 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 113 [2020-10-14 17:52:34,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:34,702 INFO L225 Difference]: With dead ends: 225 [2020-10-14 17:52:34,702 INFO L226 Difference]: Without dead ends: 134 [2020-10-14 17:52:34,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:52:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-14 17:52:34,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2020-10-14 17:52:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-14 17:52:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 135 transitions. [2020-10-14 17:52:34,714 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 135 transitions. Word has length 113 [2020-10-14 17:52:34,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:34,715 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 135 transitions. [2020-10-14 17:52:34,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:52:34,715 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 135 transitions. [2020-10-14 17:52:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-14 17:52:34,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:34,716 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:34,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 17:52:34,717 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:34,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:34,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1465953710, now seen corresponding path program 10 times [2020-10-14 17:52:34,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:34,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600275496] [2020-10-14 17:52:34,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:34,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:34,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:34,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:34,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:39,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:39,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-14 17:52:39,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:52:39,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-14 17:52:39,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:39,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:39,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:52:39,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 17:52:39,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 17:52:39,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:39,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:39,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:39,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:39,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:39,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:39,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:39,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:39,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:39,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:39,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:39,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:39,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-14 17:52:39,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600275496] [2020-10-14 17:52:39,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:39,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:52:39,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445780323] [2020-10-14 17:52:39,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:52:39,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:39,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:52:39,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:52:39,904 INFO L87 Difference]: Start difference. First operand 129 states and 135 transitions. Second operand 14 states. [2020-10-14 17:52:40,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:40,329 INFO L93 Difference]: Finished difference Result 243 states and 258 transitions. [2020-10-14 17:52:40,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:52:40,329 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 123 [2020-10-14 17:52:40,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:40,331 INFO L225 Difference]: With dead ends: 243 [2020-10-14 17:52:40,331 INFO L226 Difference]: Without dead ends: 144 [2020-10-14 17:52:40,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:52:40,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-14 17:52:40,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 139. [2020-10-14 17:52:40,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 17:52:40,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 145 transitions. [2020-10-14 17:52:40,345 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 145 transitions. Word has length 123 [2020-10-14 17:52:40,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:40,346 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 145 transitions. [2020-10-14 17:52:40,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:52:40,346 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 145 transitions. [2020-10-14 17:52:40,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-14 17:52:40,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:40,349 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:40,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 17:52:40,350 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:40,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:40,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1321419560, now seen corresponding path program 11 times [2020-10-14 17:52:40,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:40,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925102052] [2020-10-14 17:52:40,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:40,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:40,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:40,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:40,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:45,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:45,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-14 17:52:45,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:52:45,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 17:52:45,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:45,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:45,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:52:45,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:52:45,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 17:52:45,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:45,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:45,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:45,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:45,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:45,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:45,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:45,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:45,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:45,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:45,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:45,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:45,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-14 17:52:45,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925102052] [2020-10-14 17:52:45,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:45,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:52:45,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262814810] [2020-10-14 17:52:45,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:52:45,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:45,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:52:45,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:52:45,549 INFO L87 Difference]: Start difference. First operand 139 states and 145 transitions. Second operand 15 states. [2020-10-14 17:52:45,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:45,946 INFO L93 Difference]: Finished difference Result 261 states and 276 transitions. [2020-10-14 17:52:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:52:45,947 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 133 [2020-10-14 17:52:45,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:45,949 INFO L225 Difference]: With dead ends: 261 [2020-10-14 17:52:45,949 INFO L226 Difference]: Without dead ends: 154 [2020-10-14 17:52:45,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:52:45,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-14 17:52:45,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 149. [2020-10-14 17:52:45,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-14 17:52:45,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 155 transitions. [2020-10-14 17:52:45,957 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 155 transitions. Word has length 133 [2020-10-14 17:52:45,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:45,957 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 155 transitions. [2020-10-14 17:52:45,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:52:45,958 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 155 transitions. [2020-10-14 17:52:45,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-14 17:52:45,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:45,959 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:45,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 17:52:45,960 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:45,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:45,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2133630850, now seen corresponding path program 12 times [2020-10-14 17:52:45,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:45,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597390595] [2020-10-14 17:52:45,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:45,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:45,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:46,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:46,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:51,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:51,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-14 17:52:51,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:52:51,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-14 17:52:51,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:51,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:51,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:52:51,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:52:51,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 17:52:51,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:51,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:51,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:51,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:51,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:51,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:51,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:51,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:51,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:51,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:51,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:51,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:51,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-14 17:52:51,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597390595] [2020-10-14 17:52:51,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:51,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:52:51,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757727297] [2020-10-14 17:52:51,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:52:51,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:51,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:52:51,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:52:51,207 INFO L87 Difference]: Start difference. First operand 149 states and 155 transitions. Second operand 16 states. [2020-10-14 17:52:51,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:51,590 INFO L93 Difference]: Finished difference Result 279 states and 294 transitions. [2020-10-14 17:52:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:52:51,590 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 143 [2020-10-14 17:52:51,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:51,592 INFO L225 Difference]: With dead ends: 279 [2020-10-14 17:52:51,592 INFO L226 Difference]: Without dead ends: 164 [2020-10-14 17:52:51,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:52:51,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-14 17:52:51,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 159. [2020-10-14 17:52:51,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-14 17:52:51,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 165 transitions. [2020-10-14 17:52:51,605 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 165 transitions. Word has length 143 [2020-10-14 17:52:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:51,605 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 165 transitions. [2020-10-14 17:52:51,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:52:51,605 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 165 transitions. [2020-10-14 17:52:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-14 17:52:51,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:51,607 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:51,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 17:52:51,607 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:51,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:51,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1247147436, now seen corresponding path program 13 times [2020-10-14 17:52:51,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:51,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989966996] [2020-10-14 17:52:51,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:51,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:51,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:51,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:51,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:56,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:56,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-14 17:52:56,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:52:56,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 17:52:56,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:56,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:56,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:52:56,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:52:56,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 17:52:56,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:56,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:56,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:56,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:56,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:56,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:56,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:56,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:56,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:56,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:56,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:56,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:56,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-14 17:52:56,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989966996] [2020-10-14 17:52:56,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:56,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:52:56,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484432053] [2020-10-14 17:52:56,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:52:56,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:56,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:52:56,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:52:56,818 INFO L87 Difference]: Start difference. First operand 159 states and 165 transitions. Second operand 17 states. [2020-10-14 17:52:57,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:57,218 INFO L93 Difference]: Finished difference Result 297 states and 312 transitions. [2020-10-14 17:52:57,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:52:57,219 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 153 [2020-10-14 17:52:57,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:57,221 INFO L225 Difference]: With dead ends: 297 [2020-10-14 17:52:57,221 INFO L226 Difference]: Without dead ends: 174 [2020-10-14 17:52:57,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:52:57,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-14 17:52:57,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 169. [2020-10-14 17:52:57,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-14 17:52:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 175 transitions. [2020-10-14 17:52:57,229 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 175 transitions. Word has length 153 [2020-10-14 17:52:57,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:57,230 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 175 transitions. [2020-10-14 17:52:57,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:52:57,230 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 175 transitions. [2020-10-14 17:52:57,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-14 17:52:57,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:57,232 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:57,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 17:52:57,232 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:57,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:57,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1823056042, now seen corresponding path program 14 times [2020-10-14 17:52:57,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:57,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508551205] [2020-10-14 17:52:57,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:57,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:57,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:57,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:57,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:02,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:02,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-14 17:53:02,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:02,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5133 [2020-10-14 17:53:02,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:02,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:02,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:53:02,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-14 17:53:02,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 17:53:02,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:02,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:02,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:02,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:02,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:02,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:02,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:02,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:02,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:02,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:02,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:02,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:02,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-14 17:53:02,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508551205] [2020-10-14 17:53:02,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:02,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:53:02,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649612116] [2020-10-14 17:53:02,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:53:02,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:02,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:53:02,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:53:02,590 INFO L87 Difference]: Start difference. First operand 169 states and 175 transitions. Second operand 18 states. [2020-10-14 17:53:03,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:03,047 INFO L93 Difference]: Finished difference Result 315 states and 330 transitions. [2020-10-14 17:53:03,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:53:03,047 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 163 [2020-10-14 17:53:03,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:03,049 INFO L225 Difference]: With dead ends: 315 [2020-10-14 17:53:03,049 INFO L226 Difference]: Without dead ends: 184 [2020-10-14 17:53:03,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:53:03,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-14 17:53:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 179. [2020-10-14 17:53:03,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-14 17:53:03,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 185 transitions. [2020-10-14 17:53:03,061 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 185 transitions. Word has length 163 [2020-10-14 17:53:03,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:03,062 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 185 transitions. [2020-10-14 17:53:03,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:53:03,062 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 185 transitions. [2020-10-14 17:53:03,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-14 17:53:03,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:03,064 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:03,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 17:53:03,064 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:03,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:03,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1547926656, now seen corresponding path program 15 times [2020-10-14 17:53:03,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:03,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266714301] [2020-10-14 17:53:03,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:03,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:03,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:03,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:03,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:08,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:08,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-14 17:53:08,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:08,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5134 [2020-10-14 17:53:08,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:08,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:08,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 17:53:08,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:53:08,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 17:53:08,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:08,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:08,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:08,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:08,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:08,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:08,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:08,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:08,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:08,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:08,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:08,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:08,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-14 17:53:08,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266714301] [2020-10-14 17:53:08,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:08,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 17:53:08,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322077326] [2020-10-14 17:53:08,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 17:53:08,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:08,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 17:53:08,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:53:08,458 INFO L87 Difference]: Start difference. First operand 179 states and 185 transitions. Second operand 19 states. [2020-10-14 17:53:08,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:08,985 INFO L93 Difference]: Finished difference Result 333 states and 348 transitions. [2020-10-14 17:53:08,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:53:08,986 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 173 [2020-10-14 17:53:08,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:08,988 INFO L225 Difference]: With dead ends: 333 [2020-10-14 17:53:08,988 INFO L226 Difference]: Without dead ends: 194 [2020-10-14 17:53:08,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:53:08,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-14 17:53:08,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 189. [2020-10-14 17:53:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-14 17:53:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 195 transitions. [2020-10-14 17:53:08,997 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 195 transitions. Word has length 173 [2020-10-14 17:53:08,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:08,998 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 195 transitions. [2020-10-14 17:53:08,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 17:53:08,998 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 195 transitions. [2020-10-14 17:53:09,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-14 17:53:09,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:09,000 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:09,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 17:53:09,001 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:09,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:09,001 INFO L82 PathProgramCache]: Analyzing trace with hash -850062634, now seen corresponding path program 16 times [2020-10-14 17:53:09,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:09,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443066528] [2020-10-14 17:53:09,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:09,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:09,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:09,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:09,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:14,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:14,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-14 17:53:14,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:14,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-14 17:53:14,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:14,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:14,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 17:53:14,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-14 17:53:14,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 17:53:14,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:14,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:14,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:14,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:14,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:14,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:14,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:14,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:14,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:14,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:14,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:14,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:14,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-14 17:53:14,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443066528] [2020-10-14 17:53:14,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:14,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 17:53:14,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075513194] [2020-10-14 17:53:14,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 17:53:14,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:14,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 17:53:14,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:53:14,363 INFO L87 Difference]: Start difference. First operand 189 states and 195 transitions. Second operand 20 states. [2020-10-14 17:53:14,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:14,893 INFO L93 Difference]: Finished difference Result 351 states and 366 transitions. [2020-10-14 17:53:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:53:14,894 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 183 [2020-10-14 17:53:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:14,896 INFO L225 Difference]: With dead ends: 351 [2020-10-14 17:53:14,896 INFO L226 Difference]: Without dead ends: 204 [2020-10-14 17:53:14,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:53:14,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-14 17:53:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 199. [2020-10-14 17:53:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-14 17:53:14,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 205 transitions. [2020-10-14 17:53:14,905 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 205 transitions. Word has length 183 [2020-10-14 17:53:14,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:14,905 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 205 transitions. [2020-10-14 17:53:14,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 17:53:14,906 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 205 transitions. [2020-10-14 17:53:14,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-14 17:53:14,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:14,908 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:14,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 17:53:14,908 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:14,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1181593260, now seen corresponding path program 17 times [2020-10-14 17:53:14,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:14,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50144414] [2020-10-14 17:53:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:14,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:14,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:14,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:15,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:20,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:20,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-14 17:53:20,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:20,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-14 17:53:20,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:20,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:20,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 17:53:20,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:53:20,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 17:53:20,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:20,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:20,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:20,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:20,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:20,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:20,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:20,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:20,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:20,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:20,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:20,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:20,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-14 17:53:20,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50144414] [2020-10-14 17:53:20,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:20,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 17:53:20,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156481878] [2020-10-14 17:53:20,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 17:53:20,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:20,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 17:53:20,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:53:20,290 INFO L87 Difference]: Start difference. First operand 199 states and 205 transitions. Second operand 21 states. [2020-10-14 17:53:20,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:20,800 INFO L93 Difference]: Finished difference Result 369 states and 384 transitions. [2020-10-14 17:53:20,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:53:20,801 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 193 [2020-10-14 17:53:20,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:20,803 INFO L225 Difference]: With dead ends: 369 [2020-10-14 17:53:20,803 INFO L226 Difference]: Without dead ends: 214 [2020-10-14 17:53:20,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:53:20,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-14 17:53:20,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 209. [2020-10-14 17:53:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-14 17:53:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 215 transitions. [2020-10-14 17:53:20,812 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 215 transitions. Word has length 193 [2020-10-14 17:53:20,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:20,812 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 215 transitions. [2020-10-14 17:53:20,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 17:53:20,812 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 215 transitions. [2020-10-14 17:53:20,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-14 17:53:20,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:20,814 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:20,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 17:53:20,814 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:20,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:20,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1284028162, now seen corresponding path program 18 times [2020-10-14 17:53:20,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:20,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917113174] [2020-10-14 17:53:20,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:20,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:20,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:20,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:20,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:25,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:25,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-14 17:53:25,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:25,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-14 17:53:25,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:25,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:25,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 17:53:25,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-14 17:53:25,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 17:53:25,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:26,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:26,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:26,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:26,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:26,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:26,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:26,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:26,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:26,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:26,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:26,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:26,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-14 17:53:26,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917113174] [2020-10-14 17:53:26,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:26,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 17:53:26,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937455725] [2020-10-14 17:53:26,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 17:53:26,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:26,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 17:53:26,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:53:26,220 INFO L87 Difference]: Start difference. First operand 209 states and 215 transitions. Second operand 22 states. [2020-10-14 17:53:26,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:26,835 INFO L93 Difference]: Finished difference Result 387 states and 402 transitions. [2020-10-14 17:53:26,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 17:53:26,836 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 203 [2020-10-14 17:53:26,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:26,837 INFO L225 Difference]: With dead ends: 387 [2020-10-14 17:53:26,837 INFO L226 Difference]: Without dead ends: 224 [2020-10-14 17:53:26,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:53:26,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-14 17:53:26,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 219. [2020-10-14 17:53:26,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-14 17:53:26,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 225 transitions. [2020-10-14 17:53:26,846 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 225 transitions. Word has length 203 [2020-10-14 17:53:26,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:26,847 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 225 transitions. [2020-10-14 17:53:26,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 17:53:26,847 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 225 transitions. [2020-10-14 17:53:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-14 17:53:26,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:26,854 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:26,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 17:53:26,854 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:26,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:26,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1940949976, now seen corresponding path program 19 times [2020-10-14 17:53:26,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:26,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501974506] [2020-10-14 17:53:26,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:26,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:26,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:26,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:26,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:32,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:32,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-14 17:53:32,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:32,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5133 [2020-10-14 17:53:32,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:32,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:32,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 17:53:32,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-14 17:53:32,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 17:53:32,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:32,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:32,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:32,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:32,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:32,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:32,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:32,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:32,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:32,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:32,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:32,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:32,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:32,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2020-10-14 17:53:32,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501974506] [2020-10-14 17:53:32,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:32,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 17:53:32,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836173306] [2020-10-14 17:53:32,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 17:53:32,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:32,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 17:53:32,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:53:32,357 INFO L87 Difference]: Start difference. First operand 219 states and 225 transitions. Second operand 23 states. [2020-10-14 17:53:32,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:32,972 INFO L93 Difference]: Finished difference Result 405 states and 420 transitions. [2020-10-14 17:53:32,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:53:32,973 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 213 [2020-10-14 17:53:32,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:32,976 INFO L225 Difference]: With dead ends: 405 [2020-10-14 17:53:32,976 INFO L226 Difference]: Without dead ends: 234 [2020-10-14 17:53:32,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:53:32,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-14 17:53:32,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 229. [2020-10-14 17:53:32,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-14 17:53:32,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 235 transitions. [2020-10-14 17:53:32,985 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 235 transitions. Word has length 213 [2020-10-14 17:53:32,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:32,986 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 235 transitions. [2020-10-14 17:53:32,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 17:53:32,986 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 235 transitions. [2020-10-14 17:53:32,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-14 17:53:32,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:32,988 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:32,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 17:53:32,988 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:32,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1669886674, now seen corresponding path program 20 times [2020-10-14 17:53:32,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:32,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053236246] [2020-10-14 17:53:32,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:33,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:33,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:33,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:33,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:38,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:38,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-14 17:53:38,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:38,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5163 [2020-10-14 17:53:38,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:38,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:38,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 17:53:38,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:53:38,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:53:38,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:38,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:38,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:38,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:38,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:38,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:38,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:38,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:38,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:38,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:38,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:38,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:38,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-10-14 17:53:38,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053236246] [2020-10-14 17:53:38,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:38,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 17:53:38,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257420929] [2020-10-14 17:53:38,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 17:53:38,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:38,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 17:53:38,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:53:38,534 INFO L87 Difference]: Start difference. First operand 229 states and 235 transitions. Second operand 24 states. [2020-10-14 17:53:39,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:39,211 INFO L93 Difference]: Finished difference Result 423 states and 438 transitions. [2020-10-14 17:53:39,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 17:53:39,212 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 223 [2020-10-14 17:53:39,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:39,214 INFO L225 Difference]: With dead ends: 423 [2020-10-14 17:53:39,214 INFO L226 Difference]: Without dead ends: 244 [2020-10-14 17:53:39,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:53:39,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-14 17:53:39,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 239. [2020-10-14 17:53:39,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-14 17:53:39,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 245 transitions. [2020-10-14 17:53:39,224 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 245 transitions. Word has length 223 [2020-10-14 17:53:39,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:39,224 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 245 transitions. [2020-10-14 17:53:39,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 17:53:39,225 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 245 transitions. [2020-10-14 17:53:39,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-14 17:53:39,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:39,226 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:39,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 17:53:39,227 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:39,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:39,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1777867524, now seen corresponding path program 21 times [2020-10-14 17:53:39,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:39,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551199758] [2020-10-14 17:53:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:39,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:39,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:39,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:39,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:44,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:44,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-14 17:53:44,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:44,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5175 [2020-10-14 17:53:44,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:44,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:44,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 17:53:44,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-14 17:53:44,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 17:53:44,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:44,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:44,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:44,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:44,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:44,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:44,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:44,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:44,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:44,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:44,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:44,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:44,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2020-10-14 17:53:44,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551199758] [2020-10-14 17:53:44,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:44,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 17:53:44,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876649037] [2020-10-14 17:53:44,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 17:53:44,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:44,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 17:53:44,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:53:44,832 INFO L87 Difference]: Start difference. First operand 239 states and 245 transitions. Second operand 25 states. [2020-10-14 17:53:45,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:45,510 INFO L93 Difference]: Finished difference Result 441 states and 456 transitions. [2020-10-14 17:53:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:53:45,510 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 233 [2020-10-14 17:53:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:45,512 INFO L225 Difference]: With dead ends: 441 [2020-10-14 17:53:45,512 INFO L226 Difference]: Without dead ends: 254 [2020-10-14 17:53:45,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:53:45,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-14 17:53:45,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 249. [2020-10-14 17:53:45,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-14 17:53:45,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 255 transitions. [2020-10-14 17:53:45,522 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 255 transitions. Word has length 233 [2020-10-14 17:53:45,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:45,522 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 255 transitions. [2020-10-14 17:53:45,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 17:53:45,522 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 255 transitions. [2020-10-14 17:53:45,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-14 17:53:45,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:45,524 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:45,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 17:53:45,524 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:45,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:45,525 INFO L82 PathProgramCache]: Analyzing trace with hash 936678746, now seen corresponding path program 22 times [2020-10-14 17:53:45,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:45,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267528510] [2020-10-14 17:53:45,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:45,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:45,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:45,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:45,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:51,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:51,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-14 17:53:51,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:51,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5490 [2020-10-14 17:53:51,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:51,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 17:53:51,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-14 17:53:51,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 17:53:51,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:51,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:51,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:51,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:51,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:51,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:51,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:51,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:51,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:51,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:51,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:51,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:51,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2020-10-14 17:53:51,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267528510] [2020-10-14 17:53:51,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:51,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 17:53:51,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519368169] [2020-10-14 17:53:51,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 17:53:51,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:51,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 17:53:51,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:53:51,641 INFO L87 Difference]: Start difference. First operand 249 states and 255 transitions. Second operand 26 states. [2020-10-14 17:53:52,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:52,391 INFO L93 Difference]: Finished difference Result 459 states and 474 transitions. [2020-10-14 17:53:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 17:53:52,392 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 243 [2020-10-14 17:53:52,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:52,394 INFO L225 Difference]: With dead ends: 459 [2020-10-14 17:53:52,395 INFO L226 Difference]: Without dead ends: 264 [2020-10-14 17:53:52,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:53:52,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-14 17:53:52,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 259. [2020-10-14 17:53:52,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-14 17:53:52,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 265 transitions. [2020-10-14 17:53:52,405 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 265 transitions. Word has length 243 [2020-10-14 17:53:52,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:52,406 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 265 transitions. [2020-10-14 17:53:52,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 17:53:52,406 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 265 transitions. [2020-10-14 17:53:52,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-14 17:53:52,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:52,408 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:52,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 17:53:52,408 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:52,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:52,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1875420112, now seen corresponding path program 23 times [2020-10-14 17:53:52,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:52,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69732079] [2020-10-14 17:53:52,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:52,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:52,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:52,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:52,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:57,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:57,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-14 17:53:57,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:57,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5127 [2020-10-14 17:53:57,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:57,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:57,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 17:53:57,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-14 17:53:57,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 17:53:57,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:58,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:58,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:58,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:58,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:58,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:58,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:58,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:58,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:58,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:58,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:58,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:58,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2645 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2020-10-14 17:53:58,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69732079] [2020-10-14 17:53:58,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:58,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 17:53:58,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424154103] [2020-10-14 17:53:58,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 17:53:58,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:58,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 17:53:58,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:53:58,039 INFO L87 Difference]: Start difference. First operand 259 states and 265 transitions. Second operand 27 states. [2020-10-14 17:53:58,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:58,757 INFO L93 Difference]: Finished difference Result 477 states and 492 transitions. [2020-10-14 17:53:58,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 17:53:58,758 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 253 [2020-10-14 17:53:58,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:58,760 INFO L225 Difference]: With dead ends: 477 [2020-10-14 17:53:58,761 INFO L226 Difference]: Without dead ends: 274 [2020-10-14 17:53:58,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:53:58,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-14 17:53:58,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 269. [2020-10-14 17:53:58,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-14 17:53:58,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 275 transitions. [2020-10-14 17:53:58,771 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 275 transitions. Word has length 253 [2020-10-14 17:53:58,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:58,771 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 275 transitions. [2020-10-14 17:53:58,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 17:53:58,771 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 275 transitions. [2020-10-14 17:53:58,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-14 17:53:58,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:58,773 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:58,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 17:53:58,774 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:58,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:58,774 INFO L82 PathProgramCache]: Analyzing trace with hash 567463814, now seen corresponding path program 24 times [2020-10-14 17:53:58,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:58,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241520962] [2020-10-14 17:53:58,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:58,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:58,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:58,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:58,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:03,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:03,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-14 17:54:03,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:03,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5108 [2020-10-14 17:54:03,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:03,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:03,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 17:54:03,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:54:03,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 17:54:03,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:04,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:04,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:04,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:04,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:04,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:04,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:04,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:04,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:04,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:04,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:04,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:04,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2880 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2020-10-14 17:54:04,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241520962] [2020-10-14 17:54:04,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:04,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 17:54:04,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904229695] [2020-10-14 17:54:04,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 17:54:04,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:04,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 17:54:04,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:54:04,421 INFO L87 Difference]: Start difference. First operand 269 states and 275 transitions. Second operand 28 states. [2020-10-14 17:54:05,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:05,187 INFO L93 Difference]: Finished difference Result 495 states and 510 transitions. [2020-10-14 17:54:05,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 17:54:05,188 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 263 [2020-10-14 17:54:05,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:05,190 INFO L225 Difference]: With dead ends: 495 [2020-10-14 17:54:05,190 INFO L226 Difference]: Without dead ends: 284 [2020-10-14 17:54:05,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:54:05,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-14 17:54:05,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 279. [2020-10-14 17:54:05,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-14 17:54:05,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 285 transitions. [2020-10-14 17:54:05,201 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 285 transitions. Word has length 263 [2020-10-14 17:54:05,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:05,201 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 285 transitions. [2020-10-14 17:54:05,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 17:54:05,201 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 285 transitions. [2020-10-14 17:54:05,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-14 17:54:05,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:05,203 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:05,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 17:54:05,204 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:05,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:05,204 INFO L82 PathProgramCache]: Analyzing trace with hash 903958364, now seen corresponding path program 25 times [2020-10-14 17:54:05,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:05,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621838356] [2020-10-14 17:54:05,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:05,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:05,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:05,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:05,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:10,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:10,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-14 17:54:10,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:10,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5149 [2020-10-14 17:54:10,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:10,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:10,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 17:54:10,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 117 [2020-10-14 17:54:10,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 17:54:10,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:10,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:10,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:10,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:10,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:10,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:10,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:10,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:10,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:10,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:10,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:10,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:10,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3125 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2020-10-14 17:54:10,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621838356] [2020-10-14 17:54:10,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:10,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 17:54:10,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299487107] [2020-10-14 17:54:10,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 17:54:10,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:10,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 17:54:10,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:54:10,896 INFO L87 Difference]: Start difference. First operand 279 states and 285 transitions. Second operand 29 states. [2020-10-14 17:54:11,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:11,675 INFO L93 Difference]: Finished difference Result 513 states and 528 transitions. [2020-10-14 17:54:11,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 17:54:11,676 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 273 [2020-10-14 17:54:11,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:11,678 INFO L225 Difference]: With dead ends: 513 [2020-10-14 17:54:11,678 INFO L226 Difference]: Without dead ends: 294 [2020-10-14 17:54:11,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:54:11,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-14 17:54:11,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 289. [2020-10-14 17:54:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-14 17:54:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 295 transitions. [2020-10-14 17:54:11,687 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 295 transitions. Word has length 273 [2020-10-14 17:54:11,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:11,688 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 295 transitions. [2020-10-14 17:54:11,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 17:54:11,688 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 295 transitions. [2020-10-14 17:54:11,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-14 17:54:11,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:11,690 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:11,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 17:54:11,690 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:11,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:11,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1507509326, now seen corresponding path program 26 times [2020-10-14 17:54:11,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:11,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94447180] [2020-10-14 17:54:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:11,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:11,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:11,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:11,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:17,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:17,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-14 17:54:17,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:17,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5351 [2020-10-14 17:54:17,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:17,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:17,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 17:54:17,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-14 17:54:17,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 17:54:17,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:17,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:17,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:17,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:17,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:17,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:17,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:17,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:17,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:17,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:17,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:17,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:17,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3380 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2704 trivial. 0 not checked. [2020-10-14 17:54:17,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94447180] [2020-10-14 17:54:17,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:17,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 17:54:17,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553062950] [2020-10-14 17:54:17,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 17:54:17,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:17,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 17:54:17,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:54:17,626 INFO L87 Difference]: Start difference. First operand 289 states and 295 transitions. Second operand 30 states. [2020-10-14 17:54:18,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:18,467 INFO L93 Difference]: Finished difference Result 531 states and 546 transitions. [2020-10-14 17:54:18,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 17:54:18,468 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 283 [2020-10-14 17:54:18,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:18,470 INFO L225 Difference]: With dead ends: 531 [2020-10-14 17:54:18,470 INFO L226 Difference]: Without dead ends: 304 [2020-10-14 17:54:18,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:54:18,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-14 17:54:18,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 299. [2020-10-14 17:54:18,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-14 17:54:18,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 305 transitions. [2020-10-14 17:54:18,481 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 305 transitions. Word has length 283 [2020-10-14 17:54:18,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:18,481 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 305 transitions. [2020-10-14 17:54:18,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 17:54:18,481 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 305 transitions. [2020-10-14 17:54:18,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-14 17:54:18,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:18,483 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:18,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 17:54:18,484 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:18,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:18,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1390998664, now seen corresponding path program 27 times [2020-10-14 17:54:18,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:18,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336003676] [2020-10-14 17:54:18,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:18,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:18,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:18,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:18,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:23,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:23,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 301 [2020-10-14 17:54:23,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:23,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-14 17:54:23,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:23,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:23,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 17:54:23,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:54:23,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 17:54:23,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:24,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:24,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:24,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:24,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:24,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:24,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:24,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:24,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:24,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:24,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:24,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:24,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3645 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 2916 trivial. 0 not checked. [2020-10-14 17:54:24,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336003676] [2020-10-14 17:54:24,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:24,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 17:54:24,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560423725] [2020-10-14 17:54:24,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 17:54:24,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:24,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 17:54:24,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:54:24,179 INFO L87 Difference]: Start difference. First operand 299 states and 305 transitions. Second operand 31 states. [2020-10-14 17:54:25,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:25,050 INFO L93 Difference]: Finished difference Result 549 states and 564 transitions. [2020-10-14 17:54:25,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 17:54:25,050 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 293 [2020-10-14 17:54:25,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:25,052 INFO L225 Difference]: With dead ends: 549 [2020-10-14 17:54:25,052 INFO L226 Difference]: Without dead ends: 314 [2020-10-14 17:54:25,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:54:25,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-14 17:54:25,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 309. [2020-10-14 17:54:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-10-14 17:54:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 315 transitions. [2020-10-14 17:54:25,062 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 315 transitions. Word has length 293 [2020-10-14 17:54:25,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:25,063 INFO L479 AbstractCegarLoop]: Abstraction has 309 states and 315 transitions. [2020-10-14 17:54:25,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 17:54:25,063 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 315 transitions. [2020-10-14 17:54:25,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-14 17:54:25,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:25,065 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:25,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 17:54:25,065 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:25,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:25,066 INFO L82 PathProgramCache]: Analyzing trace with hash 419355102, now seen corresponding path program 28 times [2020-10-14 17:54:25,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:25,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803690433] [2020-10-14 17:54:25,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:25,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:25,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:25,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:25,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:30,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:30,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-14 17:54:30,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:30,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5507 [2020-10-14 17:54:30,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:30,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:30,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 17:54:30,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:54:30,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 17:54:30,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:31,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:31,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:31,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:31,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:31,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:31,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:31,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:31,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:31,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:31,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:31,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:31,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3920 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2020-10-14 17:54:31,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803690433] [2020-10-14 17:54:31,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:31,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 17:54:31,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162344845] [2020-10-14 17:54:31,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 17:54:31,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:31,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 17:54:31,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:54:31,186 INFO L87 Difference]: Start difference. First operand 309 states and 315 transitions. Second operand 32 states. [2020-10-14 17:54:32,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:32,100 INFO L93 Difference]: Finished difference Result 567 states and 582 transitions. [2020-10-14 17:54:32,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 17:54:32,100 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 303 [2020-10-14 17:54:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:32,102 INFO L225 Difference]: With dead ends: 567 [2020-10-14 17:54:32,102 INFO L226 Difference]: Without dead ends: 324 [2020-10-14 17:54:32,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:54:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-14 17:54:32,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 319. [2020-10-14 17:54:32,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-14 17:54:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 325 transitions. [2020-10-14 17:54:32,112 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 325 transitions. Word has length 303 [2020-10-14 17:54:32,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:32,112 INFO L479 AbstractCegarLoop]: Abstraction has 319 states and 325 transitions. [2020-10-14 17:54:32,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 17:54:32,112 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 325 transitions. [2020-10-14 17:54:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-14 17:54:32,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:32,115 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:32,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 17:54:32,115 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:32,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:32,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1203850164, now seen corresponding path program 29 times [2020-10-14 17:54:32,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:32,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40489149] [2020-10-14 17:54:32,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:32,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:32,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:32,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:32,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:37,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:37,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-14 17:54:37,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:37,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5727 [2020-10-14 17:54:37,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:37,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:37,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 17:54:37,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:54:37,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 17:54:37,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:38,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:38,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:38,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:38,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:38,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:38,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:38,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:38,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:38,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:38,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:38,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:38,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4205 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 3364 trivial. 0 not checked. [2020-10-14 17:54:38,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40489149] [2020-10-14 17:54:38,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:38,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 17:54:38,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090152903] [2020-10-14 17:54:38,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 17:54:38,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:38,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 17:54:38,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:54:38,534 INFO L87 Difference]: Start difference. First operand 319 states and 325 transitions. Second operand 33 states. [2020-10-14 17:54:39,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:39,344 INFO L93 Difference]: Finished difference Result 585 states and 600 transitions. [2020-10-14 17:54:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 17:54:39,345 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 313 [2020-10-14 17:54:39,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:39,348 INFO L225 Difference]: With dead ends: 585 [2020-10-14 17:54:39,348 INFO L226 Difference]: Without dead ends: 334 [2020-10-14 17:54:39,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:54:39,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-14 17:54:39,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 329. [2020-10-14 17:54:39,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-14 17:54:39,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 335 transitions. [2020-10-14 17:54:39,357 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 335 transitions. Word has length 313 [2020-10-14 17:54:39,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:39,357 INFO L479 AbstractCegarLoop]: Abstraction has 329 states and 335 transitions. [2020-10-14 17:54:39,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 17:54:39,357 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 335 transitions. [2020-10-14 17:54:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-14 17:54:39,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:39,360 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:39,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 17:54:39,360 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:39,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:39,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1760384502, now seen corresponding path program 30 times [2020-10-14 17:54:39,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:39,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407502592] [2020-10-14 17:54:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:39,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:39,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:39,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:39,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:44,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:44,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-14 17:54:44,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:44,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-14 17:54:44,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:44,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:44,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 17:54:44,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 137 [2020-10-14 17:54:44,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 17:54:44,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:45,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:45,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:45,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:45,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:45,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:45,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:45,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:45,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:45,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:45,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:45,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:45,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4500 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 3600 trivial. 0 not checked. [2020-10-14 17:54:45,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407502592] [2020-10-14 17:54:45,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:45,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 17:54:45,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212914799] [2020-10-14 17:54:45,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 17:54:45,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:45,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 17:54:45,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:54:45,173 INFO L87 Difference]: Start difference. First operand 329 states and 335 transitions. Second operand 34 states. [2020-10-14 17:54:46,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:46,006 INFO L93 Difference]: Finished difference Result 603 states and 618 transitions. [2020-10-14 17:54:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 17:54:46,007 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 323 [2020-10-14 17:54:46,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:46,009 INFO L225 Difference]: With dead ends: 603 [2020-10-14 17:54:46,009 INFO L226 Difference]: Without dead ends: 344 [2020-10-14 17:54:46,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:54:46,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-14 17:54:46,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 339. [2020-10-14 17:54:46,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-14 17:54:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 345 transitions. [2020-10-14 17:54:46,018 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 345 transitions. Word has length 323 [2020-10-14 17:54:46,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:46,018 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 345 transitions. [2020-10-14 17:54:46,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 17:54:46,019 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 345 transitions. [2020-10-14 17:54:46,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-14 17:54:46,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:46,021 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:46,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 17:54:46,021 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:46,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:46,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1654827808, now seen corresponding path program 31 times [2020-10-14 17:54:46,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:46,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967556637] [2020-10-14 17:54:46,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:46,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:46,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:46,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:46,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:51,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:51,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-14 17:54:51,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:51,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5558 [2020-10-14 17:54:51,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:51,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:51,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 17:54:51,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 141 [2020-10-14 17:54:51,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 17:54:51,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:52,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:52,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:52,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:52,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:52,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:52,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:52,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:52,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:52,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:52,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:52,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:52,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2020-10-14 17:54:52,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967556637] [2020-10-14 17:54:52,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:52,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 17:54:52,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101343465] [2020-10-14 17:54:52,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 17:54:52,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:52,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 17:54:52,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:54:52,367 INFO L87 Difference]: Start difference. First operand 339 states and 345 transitions. Second operand 35 states. [2020-10-14 17:54:53,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:53,410 INFO L93 Difference]: Finished difference Result 621 states and 636 transitions. [2020-10-14 17:54:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 17:54:53,411 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 333 [2020-10-14 17:54:53,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:53,413 INFO L225 Difference]: With dead ends: 621 [2020-10-14 17:54:53,413 INFO L226 Difference]: Without dead ends: 354 [2020-10-14 17:54:53,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:54:53,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-14 17:54:53,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 349. [2020-10-14 17:54:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-14 17:54:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 355 transitions. [2020-10-14 17:54:53,424 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 355 transitions. Word has length 333 [2020-10-14 17:54:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:53,424 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 355 transitions. [2020-10-14 17:54:53,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 17:54:53,425 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 355 transitions. [2020-10-14 17:54:53,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-10-14 17:54:53,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:53,427 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:53,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 17:54:53,427 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:53,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:53,428 INFO L82 PathProgramCache]: Analyzing trace with hash -980177866, now seen corresponding path program 32 times [2020-10-14 17:54:53,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:53,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177332558] [2020-10-14 17:54:53,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:53,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:53,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:53,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:53,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:59,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:59,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 351 [2020-10-14 17:54:59,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:59,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5733 [2020-10-14 17:54:59,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:59,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:59,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 17:54:59,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 145 [2020-10-14 17:54:59,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 17:54:59,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:59,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:59,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:59,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:59,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:59,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:59,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:59,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:59,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:59,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:59,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:59,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:59,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5120 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 4096 trivial. 0 not checked. [2020-10-14 17:54:59,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177332558] [2020-10-14 17:54:59,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:59,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 17:54:59,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734390149] [2020-10-14 17:54:59,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 17:54:59,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:59,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 17:54:59,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:54:59,991 INFO L87 Difference]: Start difference. First operand 349 states and 355 transitions. Second operand 36 states. [2020-10-14 17:55:01,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:01,040 INFO L93 Difference]: Finished difference Result 639 states and 654 transitions. [2020-10-14 17:55:01,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 17:55:01,041 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 343 [2020-10-14 17:55:01,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:01,043 INFO L225 Difference]: With dead ends: 639 [2020-10-14 17:55:01,043 INFO L226 Difference]: Without dead ends: 364 [2020-10-14 17:55:01,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:55:01,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-14 17:55:01,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 359. [2020-10-14 17:55:01,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-10-14 17:55:01,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 365 transitions. [2020-10-14 17:55:01,053 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 365 transitions. Word has length 343 [2020-10-14 17:55:01,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:01,053 INFO L479 AbstractCegarLoop]: Abstraction has 359 states and 365 transitions. [2020-10-14 17:55:01,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 17:55:01,054 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 365 transitions. [2020-10-14 17:55:01,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-14 17:55:01,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:01,056 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:01,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 17:55:01,056 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:01,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:01,057 INFO L82 PathProgramCache]: Analyzing trace with hash -986705908, now seen corresponding path program 33 times [2020-10-14 17:55:01,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:01,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212272438] [2020-10-14 17:55:01,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:01,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:01,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:01,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:01,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:07,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:07,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 361 [2020-10-14 17:55:07,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:55:07,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6812 [2020-10-14 17:55:07,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:07,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:07,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 17:55:07,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-14 17:55:07,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 17:55:07,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:08,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:08,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:08,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:08,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:08,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:08,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:08,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:08,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:08,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:08,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:08,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:08,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5445 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 4356 trivial. 0 not checked. [2020-10-14 17:55:08,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212272438] [2020-10-14 17:55:08,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:08,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 17:55:08,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133291039] [2020-10-14 17:55:08,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 17:55:08,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:08,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 17:55:08,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:55:08,748 INFO L87 Difference]: Start difference. First operand 359 states and 365 transitions. Second operand 37 states. [2020-10-14 17:55:09,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:09,876 INFO L93 Difference]: Finished difference Result 657 states and 672 transitions. [2020-10-14 17:55:09,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 17:55:09,877 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 353 [2020-10-14 17:55:09,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:09,879 INFO L225 Difference]: With dead ends: 657 [2020-10-14 17:55:09,879 INFO L226 Difference]: Without dead ends: 374 [2020-10-14 17:55:09,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:55:09,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-14 17:55:09,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 369. [2020-10-14 17:55:09,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-14 17:55:09,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 375 transitions. [2020-10-14 17:55:09,892 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 375 transitions. Word has length 353 [2020-10-14 17:55:09,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:09,892 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 375 transitions. [2020-10-14 17:55:09,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 17:55:09,893 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 375 transitions. [2020-10-14 17:55:09,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2020-10-14 17:55:09,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:09,895 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:09,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 17:55:09,895 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:09,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:09,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1842028446, now seen corresponding path program 34 times [2020-10-14 17:55:09,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:09,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069107455] [2020-10-14 17:55:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:09,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:09,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:10,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:10,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:15,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:15,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 371 [2020-10-14 17:55:15,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:55:15,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5447 [2020-10-14 17:55:15,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:15,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:15,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 17:55:15,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-14 17:55:15,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 17:55:15,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:16,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:16,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:16,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:16,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:16,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:16,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:16,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:16,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:16,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:16,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:16,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:16,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5780 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2020-10-14 17:55:16,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069107455] [2020-10-14 17:55:16,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:16,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 17:55:16,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254877591] [2020-10-14 17:55:16,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 17:55:16,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:16,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 17:55:16,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:55:16,271 INFO L87 Difference]: Start difference. First operand 369 states and 375 transitions. Second operand 38 states. [2020-10-14 17:55:17,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:17,215 INFO L93 Difference]: Finished difference Result 675 states and 690 transitions. [2020-10-14 17:55:17,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 17:55:17,215 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 363 [2020-10-14 17:55:17,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:17,218 INFO L225 Difference]: With dead ends: 675 [2020-10-14 17:55:17,219 INFO L226 Difference]: Without dead ends: 384 [2020-10-14 17:55:17,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:55:17,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-10-14 17:55:17,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 379. [2020-10-14 17:55:17,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-14 17:55:17,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 385 transitions. [2020-10-14 17:55:17,228 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 385 transitions. Word has length 363 [2020-10-14 17:55:17,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:17,229 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 385 transitions. [2020-10-14 17:55:17,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 17:55:17,229 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 385 transitions. [2020-10-14 17:55:17,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2020-10-14 17:55:17,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:17,232 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:17,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 17:55:17,232 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:17,233 INFO L82 PathProgramCache]: Analyzing trace with hash -651395784, now seen corresponding path program 35 times [2020-10-14 17:55:17,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:17,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241474471] [2020-10-14 17:55:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:17,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:17,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:17,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:17,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:22,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:22,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 381 [2020-10-14 17:55:22,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:55:22,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5314 [2020-10-14 17:55:22,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:22,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:22,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 17:55:22,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:55:22,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 17:55:22,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:23,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:23,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:23,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:23,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:23,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:23,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:23,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:23,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:23,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:23,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:23,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:23,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6125 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2020-10-14 17:55:23,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241474471] [2020-10-14 17:55:23,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:23,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 17:55:23,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280624997] [2020-10-14 17:55:23,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 17:55:23,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:23,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 17:55:23,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:55:23,497 INFO L87 Difference]: Start difference. First operand 379 states and 385 transitions. Second operand 39 states. [2020-10-14 17:55:24,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:24,581 INFO L93 Difference]: Finished difference Result 693 states and 708 transitions. [2020-10-14 17:55:24,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 17:55:24,582 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 373 [2020-10-14 17:55:24,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:24,584 INFO L225 Difference]: With dead ends: 693 [2020-10-14 17:55:24,585 INFO L226 Difference]: Without dead ends: 394 [2020-10-14 17:55:24,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:55:24,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-10-14 17:55:24,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 389. [2020-10-14 17:55:24,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2020-10-14 17:55:24,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 395 transitions. [2020-10-14 17:55:24,596 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 395 transitions. Word has length 373 [2020-10-14 17:55:24,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:24,596 INFO L479 AbstractCegarLoop]: Abstraction has 389 states and 395 transitions. [2020-10-14 17:55:24,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 17:55:24,597 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 395 transitions. [2020-10-14 17:55:24,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2020-10-14 17:55:24,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:24,600 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:24,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 17:55:24,600 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:24,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:24,601 INFO L82 PathProgramCache]: Analyzing trace with hash -215398770, now seen corresponding path program 36 times [2020-10-14 17:55:24,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:24,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267631258] [2020-10-14 17:55:24,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:24,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:24,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:24,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:24,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:29,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:29,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 391 [2020-10-14 17:55:29,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:55:29,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5330 [2020-10-14 17:55:29,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:29,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:29,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 17:55:29,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:55:29,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 17:55:29,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:30,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:30,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:30,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:30,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:30,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:30,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:55:30,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:30,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:30,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:30,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:30,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:30,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 5184 trivial. 0 not checked. [2020-10-14 17:55:30,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267631258] [2020-10-14 17:55:30,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:30,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 17:55:30,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592654591] [2020-10-14 17:55:30,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 17:55:30,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:30,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 17:55:30,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 17:55:30,983 INFO L87 Difference]: Start difference. First operand 389 states and 395 transitions. Second operand 40 states. [2020-10-14 17:55:32,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:32,152 INFO L93 Difference]: Finished difference Result 711 states and 726 transitions. [2020-10-14 17:55:32,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 17:55:32,153 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 383 [2020-10-14 17:55:32,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:32,155 INFO L225 Difference]: With dead ends: 711 [2020-10-14 17:55:32,155 INFO L226 Difference]: Without dead ends: 404 [2020-10-14 17:55:32,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 17:55:32,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-14 17:55:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 399. [2020-10-14 17:55:32,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-14 17:55:32,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 405 transitions. [2020-10-14 17:55:32,164 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 405 transitions. Word has length 383 [2020-10-14 17:55:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:32,165 INFO L479 AbstractCegarLoop]: Abstraction has 399 states and 405 transitions. [2020-10-14 17:55:32,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 17:55:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 405 transitions. [2020-10-14 17:55:32,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-10-14 17:55:32,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:32,168 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:32,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 17:55:32,169 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:32,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:32,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1539677284, now seen corresponding path program 37 times [2020-10-14 17:55:32,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:32,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448248784] [2020-10-14 17:55:32,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:32,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:32,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:32,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:32,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking...