/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/loops-crafted-1/mono-crafted_3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 00:02:49,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 00:02:49,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 00:02:49,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 00:02:49,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 00:02:49,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 00:02:49,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 00:02:49,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 00:02:49,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 00:02:49,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 00:02:49,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 00:02:49,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 00:02:49,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 00:02:49,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 00:02:49,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 00:02:49,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 00:02:49,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 00:02:49,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 00:02:49,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 00:02:49,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 00:02:49,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 00:02:49,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 00:02:49,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 00:02:49,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 00:02:49,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 00:02:49,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 00:02:49,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 00:02:49,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 00:02:49,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 00:02:49,137 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 00:02:49,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 00:02:49,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 00:02:49,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 00:02:49,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 00:02:49,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 00:02:49,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 00:02:49,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 00:02:49,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 00:02:49,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 00:02:49,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 00:02:49,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 00:02:49,151 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 [2020-10-15 00:02:49,188 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 00:02:49,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 00:02:49,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 00:02:49,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 00:02:49,190 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 00:02:49,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 00:02:49,191 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 00:02:49,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 00:02:49,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 00:02:49,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 00:02:49,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 00:02:49,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 00:02:49,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 00:02:49,193 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 00:02:49,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 00:02:49,194 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 00:02:49,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 00:02:49,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 00:02:49,194 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 00:02:49,194 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 00:02:49,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 00:02:49,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:02:49,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 00:02:49,195 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 00:02:49,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 00:02:49,196 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 00:02:49,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 00:02:49,196 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 00:02:49,196 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 00:02:49,197 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; [2020-10-15 00:02:49,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 00:02:49,509 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 00:02:49,513 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 00:02:49,514 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 00:02:49,515 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 00:02:49,515 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2020-10-15 00:02:49,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fab9546bc/4ccaf10e48c8423fa10ef6ff319135ea/FLAGd7427cd04 [2020-10-15 00:02:50,056 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 00:02:50,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2020-10-15 00:02:50,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fab9546bc/4ccaf10e48c8423fa10ef6ff319135ea/FLAGd7427cd04 [2020-10-15 00:02:50,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fab9546bc/4ccaf10e48c8423fa10ef6ff319135ea [2020-10-15 00:02:50,562 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 00:02:50,565 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 00:02:50,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 00:02:50,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 00:02:50,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 00:02:50,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:50" (1/1) ... [2020-10-15 00:02:50,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72b6e365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:50, skipping insertion in model container [2020-10-15 00:02:50,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:50" (1/1) ... [2020-10-15 00:02:50,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 00:02:50,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 00:02:50,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:02:50,800 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 00:02:50,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:02:50,825 INFO L208 MainTranslator]: Completed translation [2020-10-15 00:02:50,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:50 WrapperNode [2020-10-15 00:02:50,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 00:02:50,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 00:02:50,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 00:02:50,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 00:02:50,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:50" (1/1) ... [2020-10-15 00:02:50,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:50" (1/1) ... [2020-10-15 00:02:50,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:50" (1/1) ... [2020-10-15 00:02:50,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:50" (1/1) ... [2020-10-15 00:02:50,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:50" (1/1) ... [2020-10-15 00:02:50,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:50" (1/1) ... [2020-10-15 00:02:50,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:50" (1/1) ... [2020-10-15 00:02:50,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 00:02:50,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 00:02:50,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 00:02:50,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 00:02:50,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:50" (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 [2020-10-15 00:02:51,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 00:02:51,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 00:02:51,009 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-15 00:02:51,009 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 00:02:51,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 00:02:51,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-15 00:02:51,010 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 00:02:51,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 00:02:51,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 00:02:51,189 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 00:02:51,190 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-15 00:02:51,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:51 BoogieIcfgContainer [2020-10-15 00:02:51,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 00:02:51,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 00:02:51,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 00:02:51,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 00:02:51,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:02:50" (1/3) ... [2020-10-15 00:02:51,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c71071b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:51, skipping insertion in model container [2020-10-15 00:02:51,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:50" (2/3) ... [2020-10-15 00:02:51,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c71071b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:51, skipping insertion in model container [2020-10-15 00:02:51,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:51" (3/3) ... [2020-10-15 00:02:51,202 INFO L109 eAbstractionObserver]: Analyzing ICFG mono-crafted_3.c [2020-10-15 00:02:51,212 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 00:02:51,220 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 00:02:51,232 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 00:02:51,252 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 00:02:51,253 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 00:02:51,253 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 00:02:51,253 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 00:02:51,253 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 00:02:51,253 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 00:02:51,253 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 00:02:51,254 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 00:02:51,270 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-15 00:02:51,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 00:02:51,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:51,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:51,278 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:51,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1762590288, now seen corresponding path program 1 times [2020-10-15 00:02:51,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:51,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007178464] [2020-10-15 00:02:51,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:51,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:51,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:51,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:51,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:51,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-15 00:02:51,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:51,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-15 00:02:51,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:51,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:51,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:02:51,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:51,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-15 00:02:51,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 00:02:51,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:51,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:51,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:51,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:51,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:51,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:02:51,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:51,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:51,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:51,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:51,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:51,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:51,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007178464] [2020-10-15 00:02:51,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:02:51,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 00:02:51,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573411970] [2020-10-15 00:02:51,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:02:51,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:51,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:02:51,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:02:51,604 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-10-15 00:02:51,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:51,705 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2020-10-15 00:02:51,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:02:51,708 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-15 00:02:51,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:51,719 INFO L225 Difference]: With dead ends: 44 [2020-10-15 00:02:51,719 INFO L226 Difference]: Without dead ends: 16 [2020-10-15 00:02:51,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:02:51,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-15 00:02:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-15 00:02:51,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-15 00:02:51,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-10-15 00:02:51,775 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2020-10-15 00:02:51,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:51,776 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-10-15 00:02:51,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:02:51,777 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-10-15 00:02:51,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 00:02:51,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:51,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:51,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 00:02:51,779 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:51,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:51,780 INFO L82 PathProgramCache]: Analyzing trace with hash 830194858, now seen corresponding path program 1 times [2020-10-15 00:02:51,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:51,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228004394] [2020-10-15 00:02:51,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:51,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:51,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:51,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:51,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-15 00:02:51,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:51,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-15 00:02:51,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:51,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:51,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:02:51,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:51,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-15 00:02:51,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:51,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:51,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:51,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:51,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:51,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:51,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:02:51,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:51,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:51,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:51,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:51,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:51,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:51,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228004394] [2020-10-15 00:02:51,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:51,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-15 00:02:51,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883321044] [2020-10-15 00:02:51,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 00:02:51,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:51,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 00:02:51,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:02:51,993 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 4 states. [2020-10-15 00:02:52,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:52,012 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-10-15 00:02:52,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 00:02:52,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-15 00:02:52,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:52,014 INFO L225 Difference]: With dead ends: 22 [2020-10-15 00:02:52,014 INFO L226 Difference]: Without dead ends: 17 [2020-10-15 00:02:52,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:02:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-15 00:02:52,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2020-10-15 00:02:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-15 00:02:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-15 00:02:52,020 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-10-15 00:02:52,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:52,021 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-15 00:02:52,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 00:02:52,021 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-15 00:02:52,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 00:02:52,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:52,022 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:52,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 00:02:52,023 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:52,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:52,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1774582, now seen corresponding path program 2 times [2020-10-15 00:02:52,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:52,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453449983] [2020-10-15 00:02:52,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:52,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:52,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:52,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:52,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-15 00:02:52,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:52,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-15 00:02:52,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:52,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:52,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:02:52,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:52,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 00:02:52,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:52,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:52,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:52,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:52,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:52,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:52,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 00:02:52,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:52,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:52,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:52,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:52,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:52,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:52,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453449983] [2020-10-15 00:02:52,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:52,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 00:02:52,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084105980] [2020-10-15 00:02:52,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:02:52,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:52,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:02:52,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:02:52,207 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2020-10-15 00:02:52,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:52,232 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-15 00:02:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:02:52,234 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-15 00:02:52,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:52,235 INFO L225 Difference]: With dead ends: 21 [2020-10-15 00:02:52,236 INFO L226 Difference]: Without dead ends: 16 [2020-10-15 00:02:52,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:02:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-15 00:02:52,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-15 00:02:52,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-15 00:02:52,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-15 00:02:52,247 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2020-10-15 00:02:52,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:52,248 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-15 00:02:52,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:02:52,248 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-15 00:02:52,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 00:02:52,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:52,251 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:52,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 00:02:52,251 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:52,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:52,252 INFO L82 PathProgramCache]: Analyzing trace with hash 90549802, now seen corresponding path program 3 times [2020-10-15 00:02:52,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:52,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833335094] [2020-10-15 00:02:52,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:52,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:52,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:52,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:52,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-15 00:02:52,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:52,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-15 00:02:52,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:52,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:52,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:02:52,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:52,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:02:52,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:52,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:52,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:52,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:52,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:52,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:52,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:52,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:52,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:52,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:52,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:52,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:52,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:52,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833335094] [2020-10-15 00:02:52,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:52,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 00:02:52,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813450811] [2020-10-15 00:02:52,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:02:52,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:52,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:02:52,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:02:52,422 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-10-15 00:02:52,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:52,445 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-10-15 00:02:52,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:02:52,446 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-15 00:02:52,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:52,447 INFO L225 Difference]: With dead ends: 22 [2020-10-15 00:02:52,447 INFO L226 Difference]: Without dead ends: 17 [2020-10-15 00:02:52,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:02:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-15 00:02:52,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-15 00:02:52,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-15 00:02:52,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-15 00:02:52,452 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-10-15 00:02:52,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:52,452 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-15 00:02:52,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:02:52,453 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-15 00:02:52,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 00:02:52,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:52,454 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:52,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 00:02:52,454 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:52,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:52,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1452385674, now seen corresponding path program 4 times [2020-10-15 00:02:52,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:52,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483109964] [2020-10-15 00:02:52,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:52,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:52,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:52,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:52,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-15 00:02:52,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:52,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-15 00:02:52,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:52,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:52,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:02:52,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:52,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 00:02:52,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-15 00:02:52,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:52,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:52,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:52,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:52,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:52,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:52,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:52,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:52,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:52,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:52,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:52,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:52,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483109964] [2020-10-15 00:02:52,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:52,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 00:02:52,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317451737] [2020-10-15 00:02:52,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:02:52,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:52,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:02:52,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:02:52,665 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 7 states. [2020-10-15 00:02:52,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:52,688 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-10-15 00:02:52,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 00:02:52,689 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-15 00:02:52,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:52,689 INFO L225 Difference]: With dead ends: 23 [2020-10-15 00:02:52,690 INFO L226 Difference]: Without dead ends: 18 [2020-10-15 00:02:52,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:02:52,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-15 00:02:52,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-15 00:02:52,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-15 00:02:52,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-15 00:02:52,695 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-10-15 00:02:52,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:52,696 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-15 00:02:52,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:02:52,696 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-15 00:02:52,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 00:02:52,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:52,697 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:52,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 00:02:52,697 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:52,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:52,698 INFO L82 PathProgramCache]: Analyzing trace with hash -2038745174, now seen corresponding path program 5 times [2020-10-15 00:02:52,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:52,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773055728] [2020-10-15 00:02:52,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:52,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:52,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:52,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:52,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-15 00:02:52,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:52,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-15 00:02:52,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:52,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:52,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:02:52,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:52,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-15 00:02:52,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:52,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:52,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:52,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:52,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:52,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:52,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:02:52,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:52,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:52,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:52,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:52,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:52,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:52,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773055728] [2020-10-15 00:02:52,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:52,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:02:52,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371706552] [2020-10-15 00:02:52,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:02:52,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:52,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:02:52,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:02:52,851 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 8 states. [2020-10-15 00:02:52,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:52,874 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-15 00:02:52,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:02:52,875 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-15 00:02:52,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:52,876 INFO L225 Difference]: With dead ends: 24 [2020-10-15 00:02:52,876 INFO L226 Difference]: Without dead ends: 19 [2020-10-15 00:02:52,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:02:52,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-15 00:02:52,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-15 00:02:52,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-15 00:02:52,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-15 00:02:52,881 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-15 00:02:52,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:52,882 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-15 00:02:52,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:02:52,882 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-15 00:02:52,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 00:02:52,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:52,883 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:52,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 00:02:52,883 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:52,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:52,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1258946806, now seen corresponding path program 6 times [2020-10-15 00:02:52,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:52,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443087527] [2020-10-15 00:02:52,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:52,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:52,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:53,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:53,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-15 00:02:53,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:53,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-15 00:02:53,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:53,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:53,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:02:53,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:53,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-15 00:02:53,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 00:02:53,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:53,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:53,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:53,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:53,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:53,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:53,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:53,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:53,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:53,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:53,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:53,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:53,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443087527] [2020-10-15 00:02:53,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:53,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:02:53,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843960979] [2020-10-15 00:02:53,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:02:53,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:53,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:02:53,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:02:53,123 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 9 states. [2020-10-15 00:02:53,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:53,172 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-10-15 00:02:53,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:02:53,173 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-15 00:02:53,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:53,174 INFO L225 Difference]: With dead ends: 25 [2020-10-15 00:02:53,174 INFO L226 Difference]: Without dead ends: 20 [2020-10-15 00:02:53,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:02:53,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-15 00:02:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-15 00:02:53,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-15 00:02:53,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-15 00:02:53,186 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2020-10-15 00:02:53,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:53,186 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-15 00:02:53,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:02:53,186 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-15 00:02:53,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 00:02:53,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:53,189 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:53,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 00:02:53,189 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:53,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:53,190 INFO L82 PathProgramCache]: Analyzing trace with hash 408183082, now seen corresponding path program 7 times [2020-10-15 00:02:53,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:53,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408890351] [2020-10-15 00:02:53,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:53,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:53,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:53,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:53,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-15 00:02:53,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:53,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-15 00:02:53,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:53,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:53,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:02:53,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:53,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-15 00:02:53,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:53,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:53,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:53,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:53,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:53,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:53,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:53,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:53,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:53,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:53,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:53,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:53,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:53,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408890351] [2020-10-15 00:02:53,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:53,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:02:53,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532157239] [2020-10-15 00:02:53,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:02:53,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:53,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:02:53,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:02:53,477 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2020-10-15 00:02:53,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:53,498 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-15 00:02:53,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:02:53,499 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-15 00:02:53,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:53,500 INFO L225 Difference]: With dead ends: 26 [2020-10-15 00:02:53,500 INFO L226 Difference]: Without dead ends: 21 [2020-10-15 00:02:53,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:02:53,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-15 00:02:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-15 00:02:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-15 00:02:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-15 00:02:53,505 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2020-10-15 00:02:53,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:53,505 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-15 00:02:53,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:02:53,506 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-15 00:02:53,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 00:02:53,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:53,506 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:53,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 00:02:53,507 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:53,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:53,507 INFO L82 PathProgramCache]: Analyzing trace with hash -195688586, now seen corresponding path program 8 times [2020-10-15 00:02:53,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:53,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413457744] [2020-10-15 00:02:53,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:53,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:53,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:53,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:53,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-15 00:02:53,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:53,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-15 00:02:53,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:53,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:53,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:02:53,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:53,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-15 00:02:53,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:53,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:53,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:53,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:53,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:53,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:53,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:02:53,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:53,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:53,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:53,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:53,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:53,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:53,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413457744] [2020-10-15 00:02:53,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:53,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:02:53,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341023467] [2020-10-15 00:02:53,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:02:53,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:53,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:02:53,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:02:53,740 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 11 states. [2020-10-15 00:02:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:53,778 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-10-15 00:02:53,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 00:02:53,779 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-15 00:02:53,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:53,780 INFO L225 Difference]: With dead ends: 27 [2020-10-15 00:02:53,780 INFO L226 Difference]: Without dead ends: 22 [2020-10-15 00:02:53,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:02:53,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-15 00:02:53,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-15 00:02:53,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-15 00:02:53,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-15 00:02:53,787 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2020-10-15 00:02:53,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:53,788 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-15 00:02:53,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:02:53,788 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-15 00:02:53,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 00:02:53,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:53,789 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:53,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 00:02:53,790 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:53,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:53,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1735841110, now seen corresponding path program 9 times [2020-10-15 00:02:53,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:53,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104303162] [2020-10-15 00:02:53,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:53,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:53,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:53,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:53,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-15 00:02:53,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:53,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-15 00:02:53,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:53,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:53,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:02:53,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:53,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-15 00:02:53,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-15 00:02:54,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:54,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:54,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:54,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:54,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:54,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:54,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:54,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:54,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:54,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:54,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:54,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:54,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104303162] [2020-10-15 00:02:54,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:54,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:02:54,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572478660] [2020-10-15 00:02:54,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:02:54,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:54,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:02:54,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:02:54,081 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 12 states. [2020-10-15 00:02:54,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:54,108 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-15 00:02:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 00:02:54,109 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-15 00:02:54,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:54,110 INFO L225 Difference]: With dead ends: 28 [2020-10-15 00:02:54,110 INFO L226 Difference]: Without dead ends: 23 [2020-10-15 00:02:54,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:02:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-15 00:02:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-15 00:02:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-15 00:02:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-15 00:02:54,114 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-15 00:02:54,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:54,115 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-15 00:02:54,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:02:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-15 00:02:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 00:02:54,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:54,116 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:54,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 00:02:54,116 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:54,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:54,117 INFO L82 PathProgramCache]: Analyzing trace with hash 2059038198, now seen corresponding path program 10 times [2020-10-15 00:02:54,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:54,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401526617] [2020-10-15 00:02:54,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:54,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:54,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:54,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:54,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-15 00:02:54,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:54,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-15 00:02:54,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:54,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:54,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:02:54,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:54,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-15 00:02:54,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:54,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:54,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:54,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:54,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:54,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:54,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:54,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:54,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:54,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:54,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:54,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:54,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:54,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401526617] [2020-10-15 00:02:54,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:54,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:02:54,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032201362] [2020-10-15 00:02:54,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:02:54,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:54,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:02:54,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:02:54,479 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 13 states. [2020-10-15 00:02:54,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:54,516 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-10-15 00:02:54,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 00:02:54,517 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-15 00:02:54,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:54,518 INFO L225 Difference]: With dead ends: 29 [2020-10-15 00:02:54,518 INFO L226 Difference]: Without dead ends: 24 [2020-10-15 00:02:54,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:02:54,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-15 00:02:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-15 00:02:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-15 00:02:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-15 00:02:54,522 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2020-10-15 00:02:54,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:54,522 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-15 00:02:54,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:02:54,522 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-15 00:02:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 00:02:54,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:54,523 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:54,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 00:02:54,524 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:54,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:54,524 INFO L82 PathProgramCache]: Analyzing trace with hash -558787542, now seen corresponding path program 11 times [2020-10-15 00:02:54,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:54,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704209563] [2020-10-15 00:02:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:54,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:54,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:54,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:54,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-15 00:02:54,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:54,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-15 00:02:54,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:54,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:54,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:02:54,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:54,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-15 00:02:54,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:54,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:54,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:54,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:54,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:54,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:54,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:54,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:54,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:54,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:54,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:54,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:54,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:54,871 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:54,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704209563] [2020-10-15 00:02:54,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:54,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:02:54,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363014260] [2020-10-15 00:02:54,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:02:54,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:54,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:02:54,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:02:54,874 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 14 states. [2020-10-15 00:02:54,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:54,900 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-15 00:02:54,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:02:54,901 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-15 00:02:54,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:54,901 INFO L225 Difference]: With dead ends: 30 [2020-10-15 00:02:54,902 INFO L226 Difference]: Without dead ends: 25 [2020-10-15 00:02:54,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:02:54,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-15 00:02:54,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-15 00:02:54,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-15 00:02:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-15 00:02:54,906 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-10-15 00:02:54,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:54,906 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-15 00:02:54,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:02:54,907 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-15 00:02:54,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 00:02:54,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:54,907 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:54,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 00:02:54,908 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:54,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:54,908 INFO L82 PathProgramCache]: Analyzing trace with hash -107006858, now seen corresponding path program 12 times [2020-10-15 00:02:54,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:54,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102250009] [2020-10-15 00:02:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:54,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:54,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:55,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:55,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-15 00:02:55,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:55,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-15 00:02:55,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:55,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:55,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:02:55,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:55,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 00:02:55,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:55,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:55,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:55,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:55,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:55,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:55,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:55,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:55,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:55,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:55,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:55,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:55,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:55,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102250009] [2020-10-15 00:02:55,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:55,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:02:55,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205370124] [2020-10-15 00:02:55,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:02:55,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:55,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:02:55,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:02:55,269 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 15 states. [2020-10-15 00:02:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:55,301 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-15 00:02:55,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:02:55,301 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-15 00:02:55,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:55,302 INFO L225 Difference]: With dead ends: 31 [2020-10-15 00:02:55,302 INFO L226 Difference]: Without dead ends: 26 [2020-10-15 00:02:55,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:02:55,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-15 00:02:55,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-15 00:02:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-15 00:02:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-15 00:02:55,306 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2020-10-15 00:02:55,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:55,307 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-15 00:02:55,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:02:55,307 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-15 00:02:55,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:02:55,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:55,308 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:55,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 00:02:55,308 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:55,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:55,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1013292458, now seen corresponding path program 13 times [2020-10-15 00:02:55,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:55,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033683899] [2020-10-15 00:02:55,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:55,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:55,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:55,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:55,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 00:02:55,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:55,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-15 00:02:55,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:55,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:55,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-15 00:02:55,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:55,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 00:02:55,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:55,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:55,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:55,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:55,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:55,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:55,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:55,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:55,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:55,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:55,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:55,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:55,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:55,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033683899] [2020-10-15 00:02:55,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:55,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:02:55,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426134851] [2020-10-15 00:02:55,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:02:55,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:55,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:02:55,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:02:55,763 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 16 states. [2020-10-15 00:02:55,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:55,795 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-15 00:02:55,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:02:55,796 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-15 00:02:55,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:55,796 INFO L225 Difference]: With dead ends: 32 [2020-10-15 00:02:55,796 INFO L226 Difference]: Without dead ends: 27 [2020-10-15 00:02:55,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:02:55,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-15 00:02:55,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-15 00:02:55,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-15 00:02:55,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-15 00:02:55,800 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-10-15 00:02:55,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:55,800 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-15 00:02:55,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:02:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-15 00:02:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 00:02:55,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:55,802 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:55,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 00:02:55,802 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:55,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:55,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1382832886, now seen corresponding path program 14 times [2020-10-15 00:02:55,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:55,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788027489] [2020-10-15 00:02:55,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:55,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:55,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:56,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:56,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-15 00:02:56,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:56,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-15 00:02:56,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:56,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:56,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:02:56,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:56,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-15 00:02:56,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:56,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:56,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:56,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:56,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:56,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:56,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:56,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:56,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:56,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:56,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:56,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:56,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:56,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788027489] [2020-10-15 00:02:56,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:56,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:02:56,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98212206] [2020-10-15 00:02:56,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:02:56,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:56,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:02:56,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:02:56,299 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 17 states. [2020-10-15 00:02:56,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:56,333 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-15 00:02:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 00:02:56,333 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-15 00:02:56,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:56,334 INFO L225 Difference]: With dead ends: 33 [2020-10-15 00:02:56,334 INFO L226 Difference]: Without dead ends: 28 [2020-10-15 00:02:56,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:02:56,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-15 00:02:56,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-15 00:02:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-15 00:02:56,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-15 00:02:56,338 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2020-10-15 00:02:56,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:56,338 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-15 00:02:56,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:02:56,339 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-15 00:02:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 00:02:56,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:56,339 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:56,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 00:02:56,340 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:56,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:56,340 INFO L82 PathProgramCache]: Analyzing trace with hash -46315734, now seen corresponding path program 15 times [2020-10-15 00:02:56,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:56,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924628331] [2020-10-15 00:02:56,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:56,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:56,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:56,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:56,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-15 00:02:56,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:56,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-15 00:02:56,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:56,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:56,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:02:56,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:56,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-15 00:02:56,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:56,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:56,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:56,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:56,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:56,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:56,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:56,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:56,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:56,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:56,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:56,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:56,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:56,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924628331] [2020-10-15 00:02:56,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:56,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:02:56,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212103229] [2020-10-15 00:02:56,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:02:56,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:56,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:02:56,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:02:56,983 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 18 states. [2020-10-15 00:02:57,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:57,017 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-15 00:02:57,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 00:02:57,018 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-15 00:02:57,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:57,018 INFO L225 Difference]: With dead ends: 34 [2020-10-15 00:02:57,019 INFO L226 Difference]: Without dead ends: 29 [2020-10-15 00:02:57,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:02:57,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-15 00:02:57,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-15 00:02:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-15 00:02:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-15 00:02:57,022 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2020-10-15 00:02:57,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:57,023 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-15 00:02:57,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:02:57,023 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-15 00:02:57,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 00:02:57,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:57,024 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:57,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 00:02:57,024 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:57,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:57,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1400249994, now seen corresponding path program 16 times [2020-10-15 00:02:57,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:57,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777262298] [2020-10-15 00:02:57,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:57,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:57,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:57,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:57,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-15 00:02:57,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:57,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-15 00:02:57,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:57,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:57,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:02:57,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:57,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-15 00:02:57,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:57,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:57,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:57,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:57,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:57,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:57,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:57,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:57,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:57,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:57,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:57,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:57,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:57,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777262298] [2020-10-15 00:02:57,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:57,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-15 00:02:57,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85043091] [2020-10-15 00:02:57,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 00:02:57,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:57,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 00:02:57,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:02:57,643 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 19 states. [2020-10-15 00:02:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:57,679 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-15 00:02:57,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 00:02:57,680 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-15 00:02:57,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:57,680 INFO L225 Difference]: With dead ends: 35 [2020-10-15 00:02:57,680 INFO L226 Difference]: Without dead ends: 30 [2020-10-15 00:02:57,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:02:57,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-15 00:02:57,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-15 00:02:57,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-15 00:02:57,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-15 00:02:57,684 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2020-10-15 00:02:57,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:57,685 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-15 00:02:57,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 00:02:57,685 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-15 00:02:57,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:02:57,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:57,686 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:57,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 00:02:57,686 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:57,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:57,687 INFO L82 PathProgramCache]: Analyzing trace with hash -422539094, now seen corresponding path program 17 times [2020-10-15 00:02:57,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:57,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545204716] [2020-10-15 00:02:57,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:57,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:57,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:58,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:58,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:02:58,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:58,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 438 [2020-10-15 00:02:58,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:58,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:58,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-15 00:02:58,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:58,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-15 00:02:58,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:58,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:58,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:58,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:58,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:58,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:58,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:58,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:58,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:58,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:58,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:58,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:58,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:58,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545204716] [2020-10-15 00:02:58,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:58,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-15 00:02:58,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658259470] [2020-10-15 00:02:58,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 00:02:58,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:58,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 00:02:58,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:02:58,432 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 20 states. [2020-10-15 00:02:58,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:58,488 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-15 00:02:58,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 00:02:58,488 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-15 00:02:58,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:58,489 INFO L225 Difference]: With dead ends: 36 [2020-10-15 00:02:58,489 INFO L226 Difference]: Without dead ends: 31 [2020-10-15 00:02:58,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:02:58,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-15 00:02:58,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-15 00:02:58,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-15 00:02:58,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-15 00:02:58,494 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2020-10-15 00:02:58,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:58,494 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-15 00:02:58,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 00:02:58,494 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-15 00:02:58,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 00:02:58,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:58,495 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:58,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-15 00:02:58,496 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:58,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:58,496 INFO L82 PathProgramCache]: Analyzing trace with hash -178272266, now seen corresponding path program 18 times [2020-10-15 00:02:58,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:58,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548206424] [2020-10-15 00:02:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:58,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:58,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:58,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:58,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-15 00:02:58,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:58,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-15 00:02:58,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:58,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:58,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:02:58,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:58,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-15 00:02:58,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:59,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:59,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:59,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:59,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:59,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:59,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:59,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:59,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:59,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:59,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:59,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:59,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:59,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548206424] [2020-10-15 00:02:59,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:59,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-15 00:02:59,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128201857] [2020-10-15 00:02:59,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 00:02:59,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:59,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 00:02:59,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:02:59,167 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 21 states. [2020-10-15 00:02:59,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:59,200 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-15 00:02:59,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 00:02:59,201 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-15 00:02:59,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:59,201 INFO L225 Difference]: With dead ends: 37 [2020-10-15 00:02:59,201 INFO L226 Difference]: Without dead ends: 32 [2020-10-15 00:02:59,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:02:59,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-15 00:02:59,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-15 00:02:59,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-15 00:02:59,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-15 00:02:59,205 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2020-10-15 00:02:59,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:59,206 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-15 00:02:59,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 00:02:59,206 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-15 00:02:59,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 00:02:59,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:59,207 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:59,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-15 00:02:59,207 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:59,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:59,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1195935190, now seen corresponding path program 19 times [2020-10-15 00:02:59,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:59,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982248094] [2020-10-15 00:02:59,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:59,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:59,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:59,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:59,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:02:59,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:59,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-15 00:02:59,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:59,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:59,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-15 00:02:59,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:59,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 00:02:59,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:59,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:59,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:59,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:59,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:59,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:59,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:59,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:59,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:59,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:59,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:59,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:59,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:59,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982248094] [2020-10-15 00:02:59,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:59,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-15 00:02:59,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100210979] [2020-10-15 00:02:59,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 00:02:59,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:59,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 00:02:59,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:02:59,872 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 22 states. [2020-10-15 00:02:59,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:59,915 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-15 00:02:59,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 00:02:59,916 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-15 00:02:59,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:59,916 INFO L225 Difference]: With dead ends: 38 [2020-10-15 00:02:59,917 INFO L226 Difference]: Without dead ends: 33 [2020-10-15 00:02:59,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:02:59,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-15 00:02:59,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-15 00:02:59,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-15 00:02:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-15 00:02:59,921 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2020-10-15 00:02:59,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:59,922 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-15 00:02:59,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 00:02:59,922 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-15 00:02:59,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 00:02:59,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:59,923 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:59,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-15 00:02:59,923 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:59,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:59,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1616252534, now seen corresponding path program 20 times [2020-10-15 00:02:59,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:59,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458777315] [2020-10-15 00:02:59,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:59,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:59,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:00,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:00,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-15 00:03:00,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:00,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-15 00:03:00,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:00,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:00,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-15 00:03:00,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:00,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 00:03:00,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:00,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:00,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:00,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:00,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:00,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:00,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:00,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:00,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:00,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:00,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:00,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:00,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:00,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458777315] [2020-10-15 00:03:00,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:00,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-15 00:03:00,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135228001] [2020-10-15 00:03:00,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 00:03:00,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:00,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 00:03:00,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:03:00,697 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 23 states. [2020-10-15 00:03:00,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:00,731 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-15 00:03:00,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 00:03:00,732 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-15 00:03:00,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:00,733 INFO L225 Difference]: With dead ends: 39 [2020-10-15 00:03:00,733 INFO L226 Difference]: Without dead ends: 34 [2020-10-15 00:03:00,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:03:00,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-15 00:03:00,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-15 00:03:00,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 00:03:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-15 00:03:00,738 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2020-10-15 00:03:00,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:00,738 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-15 00:03:00,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 00:03:00,738 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-15 00:03:00,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 00:03:00,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:00,740 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:00,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-15 00:03:00,740 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:00,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:00,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1400241238, now seen corresponding path program 21 times [2020-10-15 00:03:00,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:00,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232772633] [2020-10-15 00:03:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:00,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:00,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:01,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:01,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-15 00:03:01,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:01,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 522 [2020-10-15 00:03:01,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:01,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:01,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-15 00:03:01,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:01,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-15 00:03:01,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:01,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:01,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:01,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:01,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:01,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:01,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:01,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:01,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:01,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:01,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:01,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:01,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:01,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232772633] [2020-10-15 00:03:01,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:01,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-15 00:03:01,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528784021] [2020-10-15 00:03:01,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 00:03:01,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:01,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 00:03:01,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:03:01,609 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 24 states. [2020-10-15 00:03:01,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:01,653 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-15 00:03:01,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 00:03:01,655 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-15 00:03:01,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:01,655 INFO L225 Difference]: With dead ends: 40 [2020-10-15 00:03:01,656 INFO L226 Difference]: Without dead ends: 35 [2020-10-15 00:03:01,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:03:01,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-15 00:03:01,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-15 00:03:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-15 00:03:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-15 00:03:01,664 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2020-10-15 00:03:01,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:01,665 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-15 00:03:01,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 00:03:01,665 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-15 00:03:01,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 00:03:01,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:01,668 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:01,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-15 00:03:01,668 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:01,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:01,669 INFO L82 PathProgramCache]: Analyzing trace with hash -422267658, now seen corresponding path program 22 times [2020-10-15 00:03:01,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:01,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092521279] [2020-10-15 00:03:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:01,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:01,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:02,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:02,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-15 00:03:02,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:02,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-15 00:03:02,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:02,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:02,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-15 00:03:02,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:02,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 00:03:02,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:02,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:02,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:02,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:02,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:02,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:02,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:02,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:02,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:02,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:02,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:02,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:02,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:02,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092521279] [2020-10-15 00:03:02,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:02,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-15 00:03:02,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540059833] [2020-10-15 00:03:02,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 00:03:02,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:02,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 00:03:02,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:03:02,572 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 25 states. [2020-10-15 00:03:02,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:02,615 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-15 00:03:02,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 00:03:02,616 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-15 00:03:02,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:02,616 INFO L225 Difference]: With dead ends: 41 [2020-10-15 00:03:02,617 INFO L226 Difference]: Without dead ends: 36 [2020-10-15 00:03:02,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:03:02,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-15 00:03:02,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-15 00:03:02,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-15 00:03:02,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-15 00:03:02,620 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2020-10-15 00:03:02,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:02,620 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-15 00:03:02,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 00:03:02,620 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-15 00:03:02,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:03:02,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:02,622 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:02,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-15 00:03:02,623 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:02,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:02,623 INFO L82 PathProgramCache]: Analyzing trace with hash -169857750, now seen corresponding path program 23 times [2020-10-15 00:03:02,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:02,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777854477] [2020-10-15 00:03:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:02,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:02,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:03,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:03,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:03:03,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:03,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-15 00:03:03,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:03,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:03,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-15 00:03:03,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:03,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:03:03,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:03,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:03,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:03,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:03,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:03,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:03,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:03,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:03,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:03,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:03,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:03,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:03,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:03,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777854477] [2020-10-15 00:03:03,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:03,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-15 00:03:03,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817065945] [2020-10-15 00:03:03,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 00:03:03,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:03,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 00:03:03,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:03:03,514 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 26 states. [2020-10-15 00:03:03,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:03,554 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-15 00:03:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 00:03:03,555 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-15 00:03:03,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:03,555 INFO L225 Difference]: With dead ends: 42 [2020-10-15 00:03:03,555 INFO L226 Difference]: Without dead ends: 37 [2020-10-15 00:03:03,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:03:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-15 00:03:03,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-15 00:03:03,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-15 00:03:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-15 00:03:03,559 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2020-10-15 00:03:03,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:03,560 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-15 00:03:03,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 00:03:03,561 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-15 00:03:03,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 00:03:03,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:03,562 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:03,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-15 00:03:03,563 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:03,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:03,564 INFO L82 PathProgramCache]: Analyzing trace with hash -935085194, now seen corresponding path program 24 times [2020-10-15 00:03:03,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:03,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939158801] [2020-10-15 00:03:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:03,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:03,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:04,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:04,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-15 00:03:04,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:04,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-15 00:03:04,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:04,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:04,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-15 00:03:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 00:03:04,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:04,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:04,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:04,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:04,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:04,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:04,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:04,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:04,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:04,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:04,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:04,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:04,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:04,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939158801] [2020-10-15 00:03:04,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:04,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-15 00:03:04,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318630064] [2020-10-15 00:03:04,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 00:03:04,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:04,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 00:03:04,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:03:04,551 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 27 states. [2020-10-15 00:03:04,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:04,602 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-15 00:03:04,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 00:03:04,604 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2020-10-15 00:03:04,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:04,604 INFO L225 Difference]: With dead ends: 43 [2020-10-15 00:03:04,605 INFO L226 Difference]: Without dead ends: 38 [2020-10-15 00:03:04,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:03:04,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-15 00:03:04,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-15 00:03:04,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-15 00:03:04,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-15 00:03:04,608 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2020-10-15 00:03:04,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:04,608 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-15 00:03:04,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 00:03:04,608 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-15 00:03:04,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 00:03:04,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:04,609 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:04,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-15 00:03:04,609 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:04,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1112667818, now seen corresponding path program 25 times [2020-10-15 00:03:04,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:04,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171693655] [2020-10-15 00:03:04,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:04,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:04,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:05,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:05,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-15 00:03:05,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:05,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 477 [2020-10-15 00:03:05,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:05,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:05,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-15 00:03:05,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:05,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-15 00:03:05,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:05,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:05,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:05,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:05,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:05,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:05,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:05,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:05,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:05,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:05,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:05,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:05,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:05,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171693655] [2020-10-15 00:03:05,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:05,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-15 00:03:05,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197636001] [2020-10-15 00:03:05,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 00:03:05,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:05,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 00:03:05,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:03:05,608 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 28 states. [2020-10-15 00:03:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:05,666 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-15 00:03:05,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 00:03:05,667 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-10-15 00:03:05,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:05,668 INFO L225 Difference]: With dead ends: 44 [2020-10-15 00:03:05,668 INFO L226 Difference]: Without dead ends: 39 [2020-10-15 00:03:05,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:03:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-15 00:03:05,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-15 00:03:05,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-15 00:03:05,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-15 00:03:05,672 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2020-10-15 00:03:05,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:05,672 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-15 00:03:05,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 00:03:05,672 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-15 00:03:05,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 00:03:05,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:05,673 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:05,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-15 00:03:05,673 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:05,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:05,674 INFO L82 PathProgramCache]: Analyzing trace with hash 168501750, now seen corresponding path program 26 times [2020-10-15 00:03:05,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:05,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318328390] [2020-10-15 00:03:05,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:05,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:05,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:06,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:06,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 00:03:06,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:06,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 683 [2020-10-15 00:03:06,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:06,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:06,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-15 00:03:06,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:06,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 00:03:06,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:06,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:06,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:06,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:06,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:06,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:06,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:06,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:06,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:06,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:06,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:06,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:06,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:06,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318328390] [2020-10-15 00:03:06,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:06,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-15 00:03:06,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165709662] [2020-10-15 00:03:06,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 00:03:06,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:06,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 00:03:06,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-15 00:03:06,874 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 29 states. [2020-10-15 00:03:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:06,941 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-15 00:03:06,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 00:03:06,944 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2020-10-15 00:03:06,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:06,945 INFO L225 Difference]: With dead ends: 45 [2020-10-15 00:03:06,945 INFO L226 Difference]: Without dead ends: 40 [2020-10-15 00:03:06,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-15 00:03:06,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-15 00:03:06,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-15 00:03:06,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 00:03:06,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-15 00:03:06,953 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2020-10-15 00:03:06,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:06,953 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-15 00:03:06,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 00:03:06,953 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-15 00:03:06,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-15 00:03:06,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:06,954 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:06,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-15 00:03:06,954 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:06,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:06,954 INFO L82 PathProgramCache]: Analyzing trace with hash 964124714, now seen corresponding path program 27 times [2020-10-15 00:03:06,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:06,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136685969] [2020-10-15 00:03:06,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:06,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:06,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:07,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:07,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-15 00:03:07,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:07,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 653 [2020-10-15 00:03:07,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:07,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:07,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-15 00:03:07,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:07,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-15 00:03:07,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:08,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:08,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:08,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:08,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:08,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:08,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:08,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:08,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:08,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:08,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:08,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:08,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:08,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136685969] [2020-10-15 00:03:08,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:08,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-15 00:03:08,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823421878] [2020-10-15 00:03:08,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 00:03:08,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:08,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 00:03:08,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:03:08,153 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 30 states. [2020-10-15 00:03:08,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:08,215 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-15 00:03:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 00:03:08,215 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2020-10-15 00:03:08,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:08,216 INFO L225 Difference]: With dead ends: 46 [2020-10-15 00:03:08,216 INFO L226 Difference]: Without dead ends: 41 [2020-10-15 00:03:08,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:03:08,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-15 00:03:08,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-15 00:03:08,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-15 00:03:08,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-15 00:03:08,220 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2020-10-15 00:03:08,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:08,220 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-15 00:03:08,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 00:03:08,220 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-15 00:03:08,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-15 00:03:08,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:08,221 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:08,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-15 00:03:08,221 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:08,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:08,222 INFO L82 PathProgramCache]: Analyzing trace with hash -141367178, now seen corresponding path program 28 times [2020-10-15 00:03:08,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:08,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347688829] [2020-10-15 00:03:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:08,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:08,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:08,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:08,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-15 00:03:08,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:08,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 625 [2020-10-15 00:03:08,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:08,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:08,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-15 00:03:08,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:08,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-15 00:03:08,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:09,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:09,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:09,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:09,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:09,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:09,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:09,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:09,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:09,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:09,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:09,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:09,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:09,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347688829] [2020-10-15 00:03:09,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:09,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-15 00:03:09,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235027176] [2020-10-15 00:03:09,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 00:03:09,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:09,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 00:03:09,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-15 00:03:09,416 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 31 states. [2020-10-15 00:03:09,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:09,481 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-10-15 00:03:09,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 00:03:09,483 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2020-10-15 00:03:09,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:09,484 INFO L225 Difference]: With dead ends: 47 [2020-10-15 00:03:09,484 INFO L226 Difference]: Without dead ends: 42 [2020-10-15 00:03:09,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-15 00:03:09,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-15 00:03:09,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-15 00:03:09,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 00:03:09,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-15 00:03:09,487 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2020-10-15 00:03:09,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:09,487 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-15 00:03:09,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 00:03:09,487 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-15 00:03:09,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 00:03:09,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:09,488 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:09,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-15 00:03:09,488 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:09,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:09,489 INFO L82 PathProgramCache]: Analyzing trace with hash -51877462, now seen corresponding path program 29 times [2020-10-15 00:03:09,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:09,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651972748] [2020-10-15 00:03:09,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:09,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:09,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:09,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:09,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:03:09,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:09,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 473 [2020-10-15 00:03:09,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:09,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:09,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-15 00:03:09,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:09,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 00:03:09,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:10,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:10,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:10,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:10,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:10,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:10,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:10,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:10,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:10,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:10,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:10,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:10,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:10,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651972748] [2020-10-15 00:03:10,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:10,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-15 00:03:10,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052638300] [2020-10-15 00:03:10,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 00:03:10,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:10,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 00:03:10,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-15 00:03:10,583 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 32 states. [2020-10-15 00:03:10,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:10,661 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-15 00:03:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 00:03:10,661 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2020-10-15 00:03:10,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:10,662 INFO L225 Difference]: With dead ends: 48 [2020-10-15 00:03:10,662 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 00:03:10,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-15 00:03:10,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 00:03:10,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-15 00:03:10,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-15 00:03:10,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-15 00:03:10,667 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2020-10-15 00:03:10,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:10,667 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-15 00:03:10,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 00:03:10,667 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-15 00:03:10,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-15 00:03:10,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:10,668 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:10,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-15 00:03:10,669 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:10,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:10,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1572663562, now seen corresponding path program 30 times [2020-10-15 00:03:10,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:10,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491638505] [2020-10-15 00:03:10,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:10,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:10,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:11,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:11,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-15 00:03:11,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:11,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-10-15 00:03:11,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:11,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:11,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-15 00:03:11,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:11,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-15 00:03:11,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:12,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:12,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:12,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:12,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:12,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:12,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:12,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:12,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:12,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:12,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:12,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:12,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-15 00:03:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:12,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491638505] [2020-10-15 00:03:12,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:12,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-15 00:03:12,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78961966] [2020-10-15 00:03:12,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-15 00:03:12,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:12,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-15 00:03:12,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 00:03:12,026 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 33 states. [2020-10-15 00:03:12,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:12,077 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-15 00:03:12,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 00:03:12,077 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 41 [2020-10-15 00:03:12,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:12,078 INFO L225 Difference]: With dead ends: 49 [2020-10-15 00:03:12,078 INFO L226 Difference]: Without dead ends: 44 [2020-10-15 00:03:12,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 00:03:12,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-15 00:03:12,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-15 00:03:12,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 00:03:12,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-15 00:03:12,083 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2020-10-15 00:03:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:12,084 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-15 00:03:12,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-15 00:03:12,084 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-15 00:03:12,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 00:03:12,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:12,085 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:12,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-15 00:03:12,085 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:12,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:12,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1472392406, now seen corresponding path program 31 times [2020-10-15 00:03:12,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:12,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084756941] [2020-10-15 00:03:12,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:12,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:12,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:12,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:12,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 00:03:12,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:12,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 558 [2020-10-15 00:03:12,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:12,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:12,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-15 00:03:12,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:12,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-15 00:03:12,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:13,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:13,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:13,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:13,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:13,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:13,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:13,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:13,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:13,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:13,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:13,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:13,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:13,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084756941] [2020-10-15 00:03:13,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:13,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-15 00:03:13,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166541644] [2020-10-15 00:03:13,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-15 00:03:13,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:13,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-15 00:03:13,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 00:03:13,303 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 34 states. [2020-10-15 00:03:13,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:13,367 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-15 00:03:13,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 00:03:13,367 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2020-10-15 00:03:13,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:13,368 INFO L225 Difference]: With dead ends: 50 [2020-10-15 00:03:13,368 INFO L226 Difference]: Without dead ends: 45 [2020-10-15 00:03:13,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 00:03:13,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-15 00:03:13,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-15 00:03:13,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 00:03:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-15 00:03:13,371 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2020-10-15 00:03:13,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:13,371 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-15 00:03:13,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-15 00:03:13,371 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-15 00:03:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-15 00:03:13,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:13,372 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:13,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-15 00:03:13,372 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:13,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:13,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1636013430, now seen corresponding path program 32 times [2020-10-15 00:03:13,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:13,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932109888] [2020-10-15 00:03:13,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:13,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:13,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:13,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:13,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:13,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-15 00:03:13,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:13,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-10-15 00:03:13,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:13,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:13,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-15 00:03:13,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:13,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-15 00:03:13,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:14,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:14,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:14,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:14,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:14,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:14,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:14,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:14,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:14,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:14,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:14,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:14,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:14,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932109888] [2020-10-15 00:03:14,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:14,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-15 00:03:14,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882977229] [2020-10-15 00:03:14,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-15 00:03:14,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:14,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-15 00:03:14,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 00:03:14,614 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 35 states. [2020-10-15 00:03:14,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:14,684 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-15 00:03:14,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 00:03:14,685 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2020-10-15 00:03:14,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:14,686 INFO L225 Difference]: With dead ends: 51 [2020-10-15 00:03:14,686 INFO L226 Difference]: Without dead ends: 46 [2020-10-15 00:03:14,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 00:03:14,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-15 00:03:14,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-15 00:03:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 00:03:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-15 00:03:14,690 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2020-10-15 00:03:14,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:14,690 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-15 00:03:14,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-15 00:03:14,690 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-15 00:03:14,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 00:03:14,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:14,691 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:14,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-15 00:03:14,691 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:14,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:14,692 INFO L82 PathProgramCache]: Analyzing trace with hash -787653462, now seen corresponding path program 33 times [2020-10-15 00:03:14,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:14,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724614726] [2020-10-15 00:03:14,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:14,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:14,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:15,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:15,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-15 00:03:15,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:15,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 609 [2020-10-15 00:03:15,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:15,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:15,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-15 00:03:15,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:15,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-15 00:03:15,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:16,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:16,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:16,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:16,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:16,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:16,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:16,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:16,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:16,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:16,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:16,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:16,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:16,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724614726] [2020-10-15 00:03:16,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:16,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-15 00:03:16,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108052728] [2020-10-15 00:03:16,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-15 00:03:16,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:16,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-15 00:03:16,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:03:16,064 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 36 states. [2020-10-15 00:03:16,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:16,123 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-15 00:03:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 00:03:16,124 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2020-10-15 00:03:16,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:16,125 INFO L225 Difference]: With dead ends: 52 [2020-10-15 00:03:16,125 INFO L226 Difference]: Without dead ends: 47 [2020-10-15 00:03:16,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:03:16,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-15 00:03:16,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-15 00:03:16,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-15 00:03:16,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-15 00:03:16,128 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2020-10-15 00:03:16,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:16,128 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-15 00:03:16,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-15 00:03:16,129 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-15 00:03:16,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-15 00:03:16,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:16,129 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:16,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-15 00:03:16,130 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:16,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:16,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1388084214, now seen corresponding path program 34 times [2020-10-15 00:03:16,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:16,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742833600] [2020-10-15 00:03:16,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:16,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:16,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:16,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:16,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-15 00:03:16,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:16,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 596 [2020-10-15 00:03:16,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:16,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:16,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-15 00:03:16,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:16,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-15 00:03:16,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:17,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:17,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:17,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:17,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:17,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:17,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:17,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:17,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:17,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:17,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:17,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:17,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:17,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742833600] [2020-10-15 00:03:17,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:17,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-15 00:03:17,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359794045] [2020-10-15 00:03:17,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-15 00:03:17,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:17,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-15 00:03:17,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 00:03:17,530 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 37 states. [2020-10-15 00:03:17,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:17,608 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-15 00:03:17,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 00:03:17,608 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 45 [2020-10-15 00:03:17,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:17,609 INFO L225 Difference]: With dead ends: 53 [2020-10-15 00:03:17,609 INFO L226 Difference]: Without dead ends: 48 [2020-10-15 00:03:17,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 00:03:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-15 00:03:17,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-15 00:03:17,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 00:03:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-15 00:03:17,611 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2020-10-15 00:03:17,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:17,612 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-15 00:03:17,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-15 00:03:17,612 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-15 00:03:17,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 00:03:17,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:17,612 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:17,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-15 00:03:17,613 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:17,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:17,613 INFO L82 PathProgramCache]: Analyzing trace with hash 116475434, now seen corresponding path program 35 times [2020-10-15 00:03:17,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:17,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327059278] [2020-10-15 00:03:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:17,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:17,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:18,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:18,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-15 00:03:18,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:18,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 637 [2020-10-15 00:03:18,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:18,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:18,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-15 00:03:18,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:18,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-15 00:03:18,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:19,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:19,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:19,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:19,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:19,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:19,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:19,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:19,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:19,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:19,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:19,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:19,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:19,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327059278] [2020-10-15 00:03:19,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:19,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-15 00:03:19,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851289474] [2020-10-15 00:03:19,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-15 00:03:19,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:19,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-15 00:03:19,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 00:03:19,101 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 38 states. [2020-10-15 00:03:19,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:19,178 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-15 00:03:19,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 00:03:19,179 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 46 [2020-10-15 00:03:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:19,179 INFO L225 Difference]: With dead ends: 54 [2020-10-15 00:03:19,179 INFO L226 Difference]: Without dead ends: 49 [2020-10-15 00:03:19,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 00:03:19,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-15 00:03:19,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-15 00:03:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 00:03:19,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-15 00:03:19,183 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2020-10-15 00:03:19,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:19,183 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-15 00:03:19,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-15 00:03:19,183 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-15 00:03:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-15 00:03:19,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:19,184 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:19,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-15 00:03:19,184 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:19,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:19,184 INFO L82 PathProgramCache]: Analyzing trace with hash -648691082, now seen corresponding path program 36 times [2020-10-15 00:03:19,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:19,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276323931] [2020-10-15 00:03:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:19,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:19,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:19,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:19,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-15 00:03:19,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:19,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 694 [2020-10-15 00:03:19,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:19,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:19,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-15 00:03:19,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:19,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-15 00:03:19,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:20,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:20,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:20,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:20,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:20,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:20,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:20,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:20,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:20,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:20,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:20,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:20,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:20,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276323931] [2020-10-15 00:03:20,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:20,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-15 00:03:20,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834143066] [2020-10-15 00:03:20,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-15 00:03:20,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:20,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-15 00:03:20,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 00:03:20,726 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 39 states. [2020-10-15 00:03:20,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:20,808 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-15 00:03:20,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 00:03:20,809 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 47 [2020-10-15 00:03:20,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:20,809 INFO L225 Difference]: With dead ends: 55 [2020-10-15 00:03:20,809 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 00:03:20,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 00:03:20,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 00:03:20,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-15 00:03:20,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 00:03:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-15 00:03:20,812 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2020-10-15 00:03:20,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:20,813 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-15 00:03:20,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-15 00:03:20,813 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-15 00:03:20,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-15 00:03:20,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:20,814 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:20,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-15 00:03:20,814 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:20,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:20,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1400950698, now seen corresponding path program 37 times [2020-10-15 00:03:20,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:20,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125971828] [2020-10-15 00:03:20,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:20,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:20,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:21,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:21,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-15 00:03:21,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:21,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 684 [2020-10-15 00:03:21,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:21,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:21,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-15 00:03:21,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:21,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-15 00:03:21,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:22,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:22,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:22,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:22,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:22,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:22,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:22,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:22,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:22,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:22,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:22,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:22,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:22,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125971828] [2020-10-15 00:03:22,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:22,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-15 00:03:22,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77092069] [2020-10-15 00:03:22,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-15 00:03:22,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:22,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-15 00:03:22,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 00:03:22,401 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 40 states. [2020-10-15 00:03:22,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:22,455 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-15 00:03:22,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 00:03:22,456 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2020-10-15 00:03:22,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:22,457 INFO L225 Difference]: With dead ends: 56 [2020-10-15 00:03:22,457 INFO L226 Difference]: Without dead ends: 51 [2020-10-15 00:03:22,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 00:03:22,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-15 00:03:22,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-15 00:03:22,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 00:03:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-15 00:03:22,461 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2020-10-15 00:03:22,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:22,461 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-15 00:03:22,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-15 00:03:22,461 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-15 00:03:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-15 00:03:22,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:22,462 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:22,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-15 00:03:22,462 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:22,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:22,463 INFO L82 PathProgramCache]: Analyzing trace with hash 515336438, now seen corresponding path program 38 times [2020-10-15 00:03:22,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:22,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168508791] [2020-10-15 00:03:22,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:22,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:22,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:23,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:23,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-15 00:03:23,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:23,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 744 [2020-10-15 00:03:23,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:23,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:23,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-15 00:03:23,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:23,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-15 00:03:23,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:24,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:24,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:24,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:24,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:24,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:24,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:24,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:24,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:24,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:24,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:24,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:24,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:24,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168508791] [2020-10-15 00:03:24,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:24,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-15 00:03:24,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958339804] [2020-10-15 00:03:24,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-15 00:03:24,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:24,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-15 00:03:24,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 00:03:24,164 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 41 states. [2020-10-15 00:03:24,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:24,244 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-15 00:03:24,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 00:03:24,245 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 49 [2020-10-15 00:03:24,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:24,246 INFO L225 Difference]: With dead ends: 57 [2020-10-15 00:03:24,246 INFO L226 Difference]: Without dead ends: 52 [2020-10-15 00:03:24,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 00:03:24,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-15 00:03:24,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-15 00:03:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 00:03:24,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-15 00:03:24,249 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2020-10-15 00:03:24,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:24,250 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-15 00:03:24,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-15 00:03:24,250 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-15 00:03:24,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-15 00:03:24,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:24,251 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:24,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-15 00:03:24,251 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:24,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:24,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1168901846, now seen corresponding path program 39 times [2020-10-15 00:03:24,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:24,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950594570] [2020-10-15 00:03:24,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:24,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:24,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:25,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:25,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-15 00:03:25,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:25,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 803 [2020-10-15 00:03:25,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:25,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:25,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-15 00:03:25,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:25,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 00:03:25,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:26,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:26,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:26,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:26,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:26,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:26,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:26,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:26,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:26,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:26,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:26,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:26,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:26,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950594570] [2020-10-15 00:03:26,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:26,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-15 00:03:26,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617414634] [2020-10-15 00:03:26,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-15 00:03:26,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:26,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-15 00:03:26,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 00:03:26,060 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 42 states. [2020-10-15 00:03:26,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:26,129 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-15 00:03:26,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 00:03:26,130 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 50 [2020-10-15 00:03:26,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:26,131 INFO L225 Difference]: With dead ends: 58 [2020-10-15 00:03:26,131 INFO L226 Difference]: Without dead ends: 53 [2020-10-15 00:03:26,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 00:03:26,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-15 00:03:26,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-15 00:03:26,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 00:03:26,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-15 00:03:26,135 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2020-10-15 00:03:26,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:26,135 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-15 00:03:26,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-15 00:03:26,135 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-15 00:03:26,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-15 00:03:26,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:26,136 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:26,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-15 00:03:26,136 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:26,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:26,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1840681098, now seen corresponding path program 40 times [2020-10-15 00:03:26,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:26,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118865227] [2020-10-15 00:03:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:26,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:26,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:27,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:27,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-15 00:03:27,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:27,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 872 [2020-10-15 00:03:27,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:27,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:27,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-15 00:03:27,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:27,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-15 00:03:27,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:28,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:28,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:28,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:28,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:28,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:28,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:28,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:28,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:28,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:28,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:28,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:28,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:28,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118865227] [2020-10-15 00:03:28,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:28,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-15 00:03:28,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359219718] [2020-10-15 00:03:28,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-15 00:03:28,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:28,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-15 00:03:28,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 00:03:28,103 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 43 states. [2020-10-15 00:03:28,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:28,182 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-15 00:03:28,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 00:03:28,182 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 51 [2020-10-15 00:03:28,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:28,183 INFO L225 Difference]: With dead ends: 59 [2020-10-15 00:03:28,183 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 00:03:28,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 00:03:28,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 00:03:28,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-15 00:03:28,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 00:03:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-15 00:03:28,186 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2020-10-15 00:03:28,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:28,186 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-15 00:03:28,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-15 00:03:28,187 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-15 00:03:28,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-15 00:03:28,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:28,187 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:28,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-15 00:03:28,187 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:28,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:28,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1191001430, now seen corresponding path program 41 times [2020-10-15 00:03:28,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:28,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814444536] [2020-10-15 00:03:28,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:28,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:28,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:29,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:29,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-15 00:03:29,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:29,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 890 [2020-10-15 00:03:29,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:29,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:29,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-15 00:03:29,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:29,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-15 00:03:29,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:30,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:30,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:30,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:30,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:30,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:30,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:30,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:30,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:30,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:30,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:30,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:30,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:30,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814444536] [2020-10-15 00:03:30,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:30,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-15 00:03:30,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128862092] [2020-10-15 00:03:30,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-15 00:03:30,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:30,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-15 00:03:30,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 00:03:30,240 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 44 states. [2020-10-15 00:03:30,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:30,323 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-15 00:03:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 00:03:30,323 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 52 [2020-10-15 00:03:30,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:30,324 INFO L225 Difference]: With dead ends: 60 [2020-10-15 00:03:30,324 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 00:03:30,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 00:03:30,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 00:03:30,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-15 00:03:30,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 00:03:30,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-15 00:03:30,327 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2020-10-15 00:03:30,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:30,327 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-15 00:03:30,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-15 00:03:30,327 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-15 00:03:30,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-15 00:03:30,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:30,329 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:30,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-15 00:03:30,329 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:30,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:30,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1769199094, now seen corresponding path program 42 times [2020-10-15 00:03:30,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:30,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327968476] [2020-10-15 00:03:30,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:30,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:30,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:31,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:31,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-15 00:03:31,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:31,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 982 [2020-10-15 00:03:31,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:31,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:31,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-15 00:03:31,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:31,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-15 00:03:31,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:32,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:32,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:32,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:32,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:32,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:32,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:32,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:32,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:32,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:32,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:32,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:32,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:32,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327968476] [2020-10-15 00:03:32,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:32,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-15 00:03:32,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633545897] [2020-10-15 00:03:32,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-15 00:03:32,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:32,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-15 00:03:32,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 00:03:32,452 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 45 states. [2020-10-15 00:03:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:32,527 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-15 00:03:32,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 00:03:32,528 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 53 [2020-10-15 00:03:32,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:32,528 INFO L225 Difference]: With dead ends: 61 [2020-10-15 00:03:32,529 INFO L226 Difference]: Without dead ends: 56 [2020-10-15 00:03:32,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 00:03:32,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-15 00:03:32,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-15 00:03:32,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 00:03:32,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-15 00:03:32,532 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2020-10-15 00:03:32,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:32,533 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-15 00:03:32,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-15 00:03:32,533 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-15 00:03:32,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 00:03:32,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:32,533 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:32,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-15 00:03:32,534 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:32,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:32,534 INFO L82 PathProgramCache]: Analyzing trace with hash -953865174, now seen corresponding path program 43 times [2020-10-15 00:03:32,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:32,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124502960] [2020-10-15 00:03:32,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:32,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:32,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:33,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:33,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-15 00:03:33,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:33,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1038 [2020-10-15 00:03:33,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:33,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:33,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-15 00:03:33,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:33,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-15 00:03:33,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:34,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:34,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:34,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:34,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:34,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:34,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:34,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:34,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:34,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:34,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:34,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:34,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:34,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124502960] [2020-10-15 00:03:34,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:34,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-15 00:03:34,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479590566] [2020-10-15 00:03:34,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-15 00:03:34,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:34,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-15 00:03:34,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 00:03:34,798 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 46 states. [2020-10-15 00:03:34,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:34,874 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-15 00:03:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 00:03:34,874 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 54 [2020-10-15 00:03:34,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:34,875 INFO L225 Difference]: With dead ends: 62 [2020-10-15 00:03:34,876 INFO L226 Difference]: Without dead ends: 57 [2020-10-15 00:03:34,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 00:03:34,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-15 00:03:34,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-15 00:03:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 00:03:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-15 00:03:34,878 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2020-10-15 00:03:34,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:34,878 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-15 00:03:34,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-15 00:03:34,879 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-15 00:03:34,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-15 00:03:34,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:34,879 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:34,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-15 00:03:34,879 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:34,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:34,879 INFO L82 PathProgramCache]: Analyzing trace with hash 530488438, now seen corresponding path program 44 times [2020-10-15 00:03:34,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:34,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650696692] [2020-10-15 00:03:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:34,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:34,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:36,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:36,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-15 00:03:36,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:36,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1137 [2020-10-15 00:03:36,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:36,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:36,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-15 00:03:36,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:36,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-15 00:03:36,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:37,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:37,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:37,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:37,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:37,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:37,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:37,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:37,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:37,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:37,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:37,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:37,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:37,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650696692] [2020-10-15 00:03:37,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:37,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-15 00:03:37,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721461470] [2020-10-15 00:03:37,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-15 00:03:37,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:37,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-15 00:03:37,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 00:03:37,372 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 47 states. [2020-10-15 00:03:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:37,441 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-15 00:03:37,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 00:03:37,441 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 55 [2020-10-15 00:03:37,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:37,442 INFO L225 Difference]: With dead ends: 63 [2020-10-15 00:03:37,442 INFO L226 Difference]: Without dead ends: 58 [2020-10-15 00:03:37,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 00:03:37,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-15 00:03:37,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-15 00:03:37,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 00:03:37,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-15 00:03:37,445 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2020-10-15 00:03:37,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:37,446 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-15 00:03:37,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-15 00:03:37,446 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-15 00:03:37,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-15 00:03:37,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:37,446 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:37,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-15 00:03:37,447 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:37,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:37,447 INFO L82 PathProgramCache]: Analyzing trace with hash -699189846, now seen corresponding path program 45 times [2020-10-15 00:03:37,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:37,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882246559] [2020-10-15 00:03:37,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:37,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:37,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:38,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:38,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-15 00:03:38,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:38,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1157 [2020-10-15 00:03:38,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:38,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:38,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-15 00:03:38,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:38,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-15 00:03:38,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:39,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:39,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:39,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:39,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:39,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:39,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:39,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:39,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:39,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:39,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:39,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:39,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:39,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882246559] [2020-10-15 00:03:39,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:39,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-15 00:03:39,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496518946] [2020-10-15 00:03:39,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-15 00:03:39,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:39,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-15 00:03:39,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 00:03:39,981 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 48 states. [2020-10-15 00:03:40,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:40,058 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-15 00:03:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 00:03:40,063 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 56 [2020-10-15 00:03:40,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:40,064 INFO L225 Difference]: With dead ends: 64 [2020-10-15 00:03:40,064 INFO L226 Difference]: Without dead ends: 59 [2020-10-15 00:03:40,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 00:03:40,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-15 00:03:40,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-15 00:03:40,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 00:03:40,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-15 00:03:40,067 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2020-10-15 00:03:40,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:40,067 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-15 00:03:40,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-15 00:03:40,068 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-15 00:03:40,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-15 00:03:40,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:40,068 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:40,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-15 00:03:40,069 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:40,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:40,069 INFO L82 PathProgramCache]: Analyzing trace with hash -164510986, now seen corresponding path program 46 times [2020-10-15 00:03:40,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:40,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333351356] [2020-10-15 00:03:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:40,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:40,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:41,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:41,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-15 00:03:41,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:41,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1261 [2020-10-15 00:03:41,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:41,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:41,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-15 00:03:41,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:41,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-15 00:03:41,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:42,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:42,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:42,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:42,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:42,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:42,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:42,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:42,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:42,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:42,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:42,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:42,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:42,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333351356] [2020-10-15 00:03:42,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:42,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-15 00:03:42,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531952618] [2020-10-15 00:03:42,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-15 00:03:42,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:42,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-15 00:03:42,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 00:03:42,791 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 49 states. [2020-10-15 00:03:42,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:42,864 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-15 00:03:42,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 00:03:42,864 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 57 [2020-10-15 00:03:42,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:42,865 INFO L225 Difference]: With dead ends: 65 [2020-10-15 00:03:42,865 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 00:03:42,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 00:03:42,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 00:03:42,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-15 00:03:42,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 00:03:42,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-15 00:03:42,869 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2020-10-15 00:03:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:42,869 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-15 00:03:42,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-15 00:03:42,870 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-15 00:03:42,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-15 00:03:42,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:42,870 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:42,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-15 00:03:42,871 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:42,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:42,871 INFO L82 PathProgramCache]: Analyzing trace with hash -769335510, now seen corresponding path program 47 times [2020-10-15 00:03:42,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:42,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063922485] [2020-10-15 00:03:42,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:42,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:42,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:44,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:44,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-15 00:03:44,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:44,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1241 [2020-10-15 00:03:44,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:44,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:44,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-15 00:03:44,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:44,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-15 00:03:44,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:45,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:45,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:45,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:45,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:45,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:45,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:45,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:45,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:45,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:45,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:45,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:45,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:45,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063922485] [2020-10-15 00:03:45,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:45,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-15 00:03:45,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301575292] [2020-10-15 00:03:45,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-15 00:03:45,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:45,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-15 00:03:45,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 00:03:45,608 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 50 states. [2020-10-15 00:03:45,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:45,688 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-15 00:03:45,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 00:03:45,689 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 58 [2020-10-15 00:03:45,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:45,689 INFO L225 Difference]: With dead ends: 66 [2020-10-15 00:03:45,689 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 00:03:45,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 00:03:45,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 00:03:45,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-15 00:03:45,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 00:03:45,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-15 00:03:45,698 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 58 [2020-10-15 00:03:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:45,699 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-15 00:03:45,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-15 00:03:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-15 00:03:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-15 00:03:45,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:45,700 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:45,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-15 00:03:45,701 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:45,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:45,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1955940726, now seen corresponding path program 48 times [2020-10-15 00:03:45,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:45,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101874388] [2020-10-15 00:03:45,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:45,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:45,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:47,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:47,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-15 00:03:47,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:47,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1392 [2020-10-15 00:03:47,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:47,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:47,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-15 00:03:47,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:47,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-15 00:03:47,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:48,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:48,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:48,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:48,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:48,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:48,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:48,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:48,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:48,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:48,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:48,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:48,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:48,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101874388] [2020-10-15 00:03:48,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:48,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-15 00:03:48,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874478792] [2020-10-15 00:03:48,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-15 00:03:48,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:48,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-15 00:03:48,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 00:03:48,659 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 51 states. [2020-10-15 00:03:48,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:48,757 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-10-15 00:03:48,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 00:03:48,758 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 59 [2020-10-15 00:03:48,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:48,758 INFO L225 Difference]: With dead ends: 67 [2020-10-15 00:03:48,758 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 00:03:48,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 00:03:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 00:03:48,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-15 00:03:48,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 00:03:48,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-15 00:03:48,762 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2020-10-15 00:03:48,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:48,762 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-15 00:03:48,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-15 00:03:48,762 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-15 00:03:48,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-15 00:03:48,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:48,763 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:48,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-15 00:03:48,763 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:48,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:48,763 INFO L82 PathProgramCache]: Analyzing trace with hash 540158122, now seen corresponding path program 49 times [2020-10-15 00:03:48,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:48,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071010212] [2020-10-15 00:03:48,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:48,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:48,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:50,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:50,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-15 00:03:50,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:50,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1412 [2020-10-15 00:03:50,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:50,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:50,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-15 00:03:50,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:50,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-15 00:03:50,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:51,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:51,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:51,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:51,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:51,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:51,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:51,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:51,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:51,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:51,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:51,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:51,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:51,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:51,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071010212] [2020-10-15 00:03:51,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:51,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-15 00:03:51,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206497921] [2020-10-15 00:03:51,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-15 00:03:51,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:51,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-15 00:03:51,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 00:03:51,773 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 52 states. [2020-10-15 00:03:51,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:51,856 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-15 00:03:51,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 00:03:51,857 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 60 [2020-10-15 00:03:51,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:51,858 INFO L225 Difference]: With dead ends: 68 [2020-10-15 00:03:51,858 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 00:03:51,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 00:03:51,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 00:03:51,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-15 00:03:51,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 00:03:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-15 00:03:51,861 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2020-10-15 00:03:51,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:51,861 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-15 00:03:51,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-15 00:03:51,862 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-15 00:03:51,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-15 00:03:51,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:51,862 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:51,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-15 00:03:51,863 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:51,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:51,863 INFO L82 PathProgramCache]: Analyzing trace with hash -399429642, now seen corresponding path program 50 times [2020-10-15 00:03:51,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:51,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783576372] [2020-10-15 00:03:51,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:51,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:51,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:53,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:53,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-15 00:03:53,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:53,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1468 [2020-10-15 00:03:53,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:53,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:53,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-15 00:03:53,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:53,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-15 00:03:53,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:54,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:54,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:54,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:54,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:54,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:54,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:54,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:54,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:54,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:54,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:54,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:54,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:54,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783576372] [2020-10-15 00:03:54,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:54,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-15 00:03:54,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260210281] [2020-10-15 00:03:54,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-15 00:03:54,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:54,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-15 00:03:54,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 00:03:54,991 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 53 states. [2020-10-15 00:03:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:55,099 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-15 00:03:55,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 00:03:55,103 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 61 [2020-10-15 00:03:55,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:55,104 INFO L225 Difference]: With dead ends: 69 [2020-10-15 00:03:55,104 INFO L226 Difference]: Without dead ends: 64 [2020-10-15 00:03:55,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 00:03:55,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-15 00:03:55,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-15 00:03:55,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 00:03:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-15 00:03:55,115 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2020-10-15 00:03:55,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:55,115 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-15 00:03:55,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-15 00:03:55,116 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-15 00:03:55,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-15 00:03:55,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:55,116 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:55,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-15 00:03:55,117 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:55,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:55,117 INFO L82 PathProgramCache]: Analyzing trace with hash 538120746, now seen corresponding path program 51 times [2020-10-15 00:03:55,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:55,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852745039] [2020-10-15 00:03:55,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:55,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:55,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:56,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:56,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-15 00:03:56,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:56,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1184 [2020-10-15 00:03:56,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:56,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:56,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-15 00:03:56,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:56,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-15 00:03:56,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:58,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:58,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:58,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:58,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:58,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:58,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:58,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:58,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:58,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:58,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:58,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:58,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:58,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852745039] [2020-10-15 00:03:58,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:58,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-15 00:03:58,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004302733] [2020-10-15 00:03:58,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-15 00:03:58,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:58,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-15 00:03:58,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 00:03:58,049 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 54 states. [2020-10-15 00:03:58,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:58,147 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-15 00:03:58,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-15 00:03:58,148 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 62 [2020-10-15 00:03:58,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:58,149 INFO L225 Difference]: With dead ends: 70 [2020-10-15 00:03:58,149 INFO L226 Difference]: Without dead ends: 65 [2020-10-15 00:03:58,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 00:03:58,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-15 00:03:58,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-15 00:03:58,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 00:03:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-15 00:03:58,152 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2020-10-15 00:03:58,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:58,153 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-15 00:03:58,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-15 00:03:58,153 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-15 00:03:58,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-15 00:03:58,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:58,154 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:58,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-15 00:03:58,154 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:58,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:58,154 INFO L82 PathProgramCache]: Analyzing trace with hash -462588298, now seen corresponding path program 52 times [2020-10-15 00:03:58,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:58,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914337103] [2020-10-15 00:03:58,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:58,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:58,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:59,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:59,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-15 00:03:59,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:59,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1197 [2020-10-15 00:03:59,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:59,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:59,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-15 00:03:59,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:59,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-15 00:03:59,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:01,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:01,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:01,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:01,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:01,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:01,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:01,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:01,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:01,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:01,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:01,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:01,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:01,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914337103] [2020-10-15 00:04:01,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:01,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-15 00:04:01,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121134870] [2020-10-15 00:04:01,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-15 00:04:01,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:01,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-15 00:04:01,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 00:04:01,165 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 55 states. [2020-10-15 00:04:01,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:01,278 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-15 00:04:01,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-15 00:04:01,279 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 63 [2020-10-15 00:04:01,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:01,280 INFO L225 Difference]: With dead ends: 71 [2020-10-15 00:04:01,280 INFO L226 Difference]: Without dead ends: 66 [2020-10-15 00:04:01,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 00:04:01,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-15 00:04:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-15 00:04:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 00:04:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-15 00:04:01,284 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2020-10-15 00:04:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:01,285 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-15 00:04:01,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-15 00:04:01,285 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-15 00:04:01,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-15 00:04:01,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:01,286 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:01,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-15 00:04:01,286 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:01,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:01,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1419797590, now seen corresponding path program 53 times [2020-10-15 00:04:01,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:01,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730629237] [2020-10-15 00:04:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:01,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:01,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:02,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:02,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-15 00:04:02,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:02,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1322 [2020-10-15 00:04:02,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:02,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:02,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-15 00:04:02,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:02,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-15 00:04:02,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:04,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:04,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:04,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:04,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:04,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:04,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:04,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:04,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:04,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:04,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:04,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:04,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:04,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730629237] [2020-10-15 00:04:04,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:04,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-15 00:04:04,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849523197] [2020-10-15 00:04:04,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-15 00:04:04,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:04,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-15 00:04:04,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 00:04:04,433 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 56 states. [2020-10-15 00:04:04,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:04,546 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-15 00:04:04,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 00:04:04,550 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 64 [2020-10-15 00:04:04,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:04,550 INFO L225 Difference]: With dead ends: 72 [2020-10-15 00:04:04,551 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 00:04:04,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 00:04:04,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 00:04:04,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-15 00:04:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 00:04:04,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-15 00:04:04,554 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2020-10-15 00:04:04,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:04,554 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-15 00:04:04,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-15 00:04:04,554 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-15 00:04:04,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-15 00:04:04,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:04,555 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:04,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-15 00:04:04,555 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:04,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:04,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1028514570, now seen corresponding path program 54 times [2020-10-15 00:04:04,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:04,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086241062] [2020-10-15 00:04:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:04,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:04,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:05,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:05,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-15 00:04:05,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:05,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1325 [2020-10-15 00:04:05,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:05,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:05,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-15 00:04:05,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:05,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-15 00:04:05,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:07,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:07,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:07,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:07,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:07,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:07,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:07,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:07,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:07,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:07,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:07,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:07,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:07,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086241062] [2020-10-15 00:04:07,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:07,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-15 00:04:07,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390857369] [2020-10-15 00:04:07,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-15 00:04:07,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:07,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-15 00:04:07,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 00:04:07,812 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 57 states. [2020-10-15 00:04:07,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:07,918 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-15 00:04:07,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-15 00:04:07,918 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 65 [2020-10-15 00:04:07,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:07,919 INFO L225 Difference]: With dead ends: 73 [2020-10-15 00:04:07,919 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 00:04:07,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 00:04:07,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 00:04:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-15 00:04:07,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 00:04:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-15 00:04:07,929 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2020-10-15 00:04:07,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:07,929 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-15 00:04:07,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-15 00:04:07,929 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-15 00:04:07,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-15 00:04:07,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:07,930 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:07,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-15 00:04:07,930 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:07,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:07,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1783642838, now seen corresponding path program 55 times [2020-10-15 00:04:07,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:07,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731983224] [2020-10-15 00:04:07,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:07,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:07,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:09,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:09,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-15 00:04:09,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:09,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1357 [2020-10-15 00:04:09,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:09,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:09,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-15 00:04:09,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:09,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-15 00:04:09,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:11,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:11,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:11,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:11,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:11,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:11,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:11,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:11,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:11,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:11,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:11,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:11,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:11,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731983224] [2020-10-15 00:04:11,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:11,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-15 00:04:11,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847918425] [2020-10-15 00:04:11,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-15 00:04:11,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:11,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-15 00:04:11,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 00:04:11,242 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 58 states. [2020-10-15 00:04:11,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:11,351 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-15 00:04:11,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-15 00:04:11,352 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 66 [2020-10-15 00:04:11,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:11,353 INFO L225 Difference]: With dead ends: 74 [2020-10-15 00:04:11,353 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 00:04:11,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 00:04:11,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 00:04:11,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-15 00:04:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 00:04:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-15 00:04:11,355 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2020-10-15 00:04:11,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:11,356 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-15 00:04:11,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-15 00:04:11,356 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-15 00:04:11,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-15 00:04:11,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:11,357 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:11,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-15 00:04:11,357 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:11,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:11,357 INFO L82 PathProgramCache]: Analyzing trace with hash 577184630, now seen corresponding path program 56 times [2020-10-15 00:04:11,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:11,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241275694] [2020-10-15 00:04:11,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:11,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:11,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:12,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:12,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-15 00:04:12,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:12,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1376 [2020-10-15 00:04:12,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:12,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:12,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-15 00:04:12,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:12,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-15 00:04:12,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:14,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:14,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:14,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:14,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:14,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:14,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:14,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:14,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:14,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:14,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:14,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:14,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:14,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241275694] [2020-10-15 00:04:14,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:14,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-15 00:04:14,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780336482] [2020-10-15 00:04:14,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-15 00:04:14,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:14,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-15 00:04:14,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 00:04:14,766 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 59 states. [2020-10-15 00:04:14,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:14,871 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-10-15 00:04:14,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-15 00:04:14,872 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 67 [2020-10-15 00:04:14,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:14,873 INFO L225 Difference]: With dead ends: 75 [2020-10-15 00:04:14,873 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 00:04:14,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 00:04:14,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 00:04:14,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-15 00:04:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 00:04:14,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-15 00:04:14,876 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2020-10-15 00:04:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:14,876 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-15 00:04:14,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-15 00:04:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-15 00:04:14,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-15 00:04:14,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:14,877 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:14,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-15 00:04:14,877 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:14,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:14,878 INFO L82 PathProgramCache]: Analyzing trace with hash 748392106, now seen corresponding path program 57 times [2020-10-15 00:04:14,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:14,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317062476] [2020-10-15 00:04:14,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:14,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:14,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:16,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:16,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-15 00:04:16,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:16,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1453 [2020-10-15 00:04:16,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:16,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:16,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-15 00:04:16,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:16,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-15 00:04:16,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:18,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:18,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:18,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:18,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:18,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:18,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:18,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:18,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:18,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:18,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:18,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:18,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:18,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317062476] [2020-10-15 00:04:18,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:18,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-15 00:04:18,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365340044] [2020-10-15 00:04:18,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-15 00:04:18,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:18,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-15 00:04:18,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 00:04:18,421 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 60 states. [2020-10-15 00:04:18,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:18,527 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-10-15 00:04:18,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-15 00:04:18,534 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 68 [2020-10-15 00:04:18,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:18,535 INFO L225 Difference]: With dead ends: 76 [2020-10-15 00:04:18,535 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 00:04:18,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 00:04:18,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 00:04:18,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-15 00:04:18,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 00:04:18,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-15 00:04:18,540 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2020-10-15 00:04:18,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:18,540 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-15 00:04:18,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-15 00:04:18,540 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-15 00:04:18,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-15 00:04:18,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:18,541 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:18,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-15 00:04:18,542 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:18,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:18,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1760856566, now seen corresponding path program 58 times [2020-10-15 00:04:18,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:18,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713876203] [2020-10-15 00:04:18,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:18,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:18,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:20,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:20,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-15 00:04:20,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:20,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1562 [2020-10-15 00:04:20,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:20,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:20,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-15 00:04:20,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:20,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-15 00:04:20,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:22,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:22,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:22,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:22,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:22,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:22,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:22,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:22,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:22,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:22,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:22,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:22,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:22,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713876203] [2020-10-15 00:04:22,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:22,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-15 00:04:22,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764111522] [2020-10-15 00:04:22,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-15 00:04:22,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:22,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-15 00:04:22,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 00:04:22,280 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 61 states. [2020-10-15 00:04:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:22,374 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-15 00:04:22,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-15 00:04:22,375 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 69 [2020-10-15 00:04:22,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:22,376 INFO L225 Difference]: With dead ends: 77 [2020-10-15 00:04:22,376 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 00:04:22,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 00:04:22,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 00:04:22,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-15 00:04:22,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 00:04:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-15 00:04:22,380 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2020-10-15 00:04:22,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:22,381 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-15 00:04:22,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-15 00:04:22,381 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-15 00:04:22,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-15 00:04:22,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:22,382 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:22,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-15 00:04:22,382 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:22,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:22,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1212483542, now seen corresponding path program 59 times [2020-10-15 00:04:22,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:22,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219962055] [2020-10-15 00:04:22,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:22,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:22,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:24,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:24,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-15 00:04:24,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:24,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2009 [2020-10-15 00:04:24,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:24,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:24,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-15 00:04:24,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:24,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-15 00:04:24,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:26,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:26,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:26,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:26,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:26,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:26,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:26,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:26,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:26,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:26,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:26,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:26,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:26,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219962055] [2020-10-15 00:04:26,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:26,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-15 00:04:26,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777313735] [2020-10-15 00:04:26,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-15 00:04:26,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:26,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-15 00:04:26,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 00:04:26,649 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 62 states. [2020-10-15 00:04:26,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:26,766 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-15 00:04:26,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-15 00:04:26,767 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 70 [2020-10-15 00:04:26,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:26,768 INFO L225 Difference]: With dead ends: 78 [2020-10-15 00:04:26,768 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 00:04:26,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 00:04:26,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 00:04:26,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-15 00:04:26,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 00:04:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-15 00:04:26,771 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2020-10-15 00:04:26,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:26,771 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-15 00:04:26,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-15 00:04:26,771 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-15 00:04:26,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-15 00:04:26,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:26,771 INFO L422 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:26,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-15 00:04:26,772 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:26,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:26,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1103253622, now seen corresponding path program 60 times [2020-10-15 00:04:26,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:26,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827426375] [2020-10-15 00:04:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:26,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:26,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:28,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:28,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-15 00:04:28,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:28,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1755 [2020-10-15 00:04:28,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:28,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:28,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-15 00:04:28,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:28,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-15 00:04:28,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:30,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:30,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:30,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:30,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:30,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:30,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:30,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:30,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:30,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:30,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:30,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:30,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:30,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827426375] [2020-10-15 00:04:30,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:30,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-15 00:04:30,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680376456] [2020-10-15 00:04:30,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-15 00:04:30,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:30,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-15 00:04:30,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 00:04:30,865 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 63 states. [2020-10-15 00:04:30,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:30,982 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-15 00:04:30,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-15 00:04:30,983 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 71 [2020-10-15 00:04:30,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:30,984 INFO L225 Difference]: With dead ends: 79 [2020-10-15 00:04:30,984 INFO L226 Difference]: Without dead ends: 74 [2020-10-15 00:04:30,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 00:04:30,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-15 00:04:30,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-15 00:04:30,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 00:04:30,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-15 00:04:30,988 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2020-10-15 00:04:30,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:30,991 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-15 00:04:30,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-15 00:04:30,992 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-15 00:04:30,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-15 00:04:30,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:30,993 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:30,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-15 00:04:30,993 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:30,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:30,994 INFO L82 PathProgramCache]: Analyzing trace with hash -123338326, now seen corresponding path program 61 times [2020-10-15 00:04:30,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:30,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496639532] [2020-10-15 00:04:30,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:31,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:31,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:32,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:32,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-15 00:04:32,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:32,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1950 [2020-10-15 00:04:32,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:32,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:32,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-15 00:04:32,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:32,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-15 00:04:32,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:35,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:35,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:35,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:35,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:35,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:35,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:35,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:35,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:35,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:35,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:35,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:35,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:35,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496639532] [2020-10-15 00:04:35,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:35,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-15 00:04:35,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700651682] [2020-10-15 00:04:35,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-15 00:04:35,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:35,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-15 00:04:35,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 00:04:35,356 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 64 states. [2020-10-15 00:04:35,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:35,475 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-10-15 00:04:35,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-15 00:04:35,475 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 72 [2020-10-15 00:04:35,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:35,476 INFO L225 Difference]: With dead ends: 80 [2020-10-15 00:04:35,476 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 00:04:35,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 00:04:35,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 00:04:35,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-15 00:04:35,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 00:04:35,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-15 00:04:35,479 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2020-10-15 00:04:35,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:35,479 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-15 00:04:35,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-15 00:04:35,479 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-15 00:04:35,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-15 00:04:35,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:35,480 INFO L422 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:35,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-15 00:04:35,480 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:35,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:35,480 INFO L82 PathProgramCache]: Analyzing trace with hash 507016950, now seen corresponding path program 62 times [2020-10-15 00:04:35,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:35,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252403489] [2020-10-15 00:04:35,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:35,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:35,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:37,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:37,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-15 00:04:37,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:37,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1830 [2020-10-15 00:04:37,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:37,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:37,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-15 00:04:37,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:37,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-15 00:04:37,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:39,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:39,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:39,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:39,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:39,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:39,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:39,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:39,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:39,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:39,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:39,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:39,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:39,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252403489] [2020-10-15 00:04:39,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:39,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-15 00:04:39,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570343099] [2020-10-15 00:04:39,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-15 00:04:39,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:39,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-15 00:04:39,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 00:04:39,806 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 65 states. [2020-10-15 00:04:39,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:39,943 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-15 00:04:39,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-15 00:04:39,944 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 73 [2020-10-15 00:04:39,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:39,944 INFO L225 Difference]: With dead ends: 81 [2020-10-15 00:04:39,944 INFO L226 Difference]: Without dead ends: 76 [2020-10-15 00:04:39,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 00:04:39,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-15 00:04:39,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-15 00:04:39,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 00:04:39,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-15 00:04:39,947 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2020-10-15 00:04:39,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:39,947 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-15 00:04:39,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-15 00:04:39,947 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-15 00:04:39,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-15 00:04:39,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:39,948 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:39,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-15 00:04:39,948 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:39,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:39,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1426805974, now seen corresponding path program 63 times [2020-10-15 00:04:39,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:39,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557517906] [2020-10-15 00:04:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:39,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:40,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:41,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:41,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-15 00:04:41,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:41,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1996 [2020-10-15 00:04:41,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:41,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:41,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-15 00:04:41,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:41,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-15 00:04:41,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:44,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:44,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:44,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:44,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:44,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:44,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:04:44,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:44,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:44,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:44,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:44,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:44,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:04:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:44,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557517906] [2020-10-15 00:04:44,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:44,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-15 00:04:44,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170423446] [2020-10-15 00:04:44,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-15 00:04:44,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:44,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-15 00:04:44,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 00:04:44,565 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 66 states. [2020-10-15 00:04:44,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:44,683 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-15 00:04:44,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-15 00:04:44,684 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 74 [2020-10-15 00:04:44,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:44,685 INFO L225 Difference]: With dead ends: 82 [2020-10-15 00:04:44,685 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 00:04:44,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 00:04:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 00:04:44,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-15 00:04:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 00:04:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-15 00:04:44,688 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2020-10-15 00:04:44,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:44,688 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-15 00:04:44,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-15 00:04:44,689 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-15 00:04:44,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-15 00:04:44,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:44,689 INFO L422 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:44,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-15 00:04:44,690 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:44,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:44,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1245774474, now seen corresponding path program 64 times [2020-10-15 00:04:44,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:44,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635308341] [2020-10-15 00:04:44,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:44,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:44,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:46,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:46,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-15 00:04:46,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:46,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2158 [2020-10-15 00:04:46,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:46,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:46,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-15 00:04:46,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:46,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-15 00:04:46,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:49,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:49,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:49,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:49,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:49,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:49,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:49,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:49,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:49,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:49,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:49,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:49,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:49,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635308341] [2020-10-15 00:04:49,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:49,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-15 00:04:49,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401702687] [2020-10-15 00:04:49,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-15 00:04:49,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:49,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-15 00:04:49,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 00:04:49,516 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 67 states. [2020-10-15 00:04:49,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:49,628 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-10-15 00:04:49,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-15 00:04:49,629 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 75 [2020-10-15 00:04:49,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:49,629 INFO L225 Difference]: With dead ends: 83 [2020-10-15 00:04:49,629 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 00:04:49,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 00:04:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 00:04:49,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-15 00:04:49,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 00:04:49,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-15 00:04:49,633 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2020-10-15 00:04:49,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:49,633 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-15 00:04:49,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-15 00:04:49,633 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-15 00:04:49,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-15 00:04:49,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:49,634 INFO L422 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:49,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-15 00:04:49,634 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:49,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:49,634 INFO L82 PathProgramCache]: Analyzing trace with hash 71234730, now seen corresponding path program 65 times [2020-10-15 00:04:49,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:49,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844981321] [2020-10-15 00:04:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:49,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:50,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:51,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:51,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-15 00:04:51,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:51,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2017 [2020-10-15 00:04:51,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:51,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:51,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-15 00:04:51,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:51,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-15 00:04:51,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:54,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:54,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:54,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:54,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:54,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:54,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:54,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:54,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:54,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:54,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:54,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:54,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:54,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844981321] [2020-10-15 00:04:54,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:54,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-15 00:04:54,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392736271] [2020-10-15 00:04:54,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-15 00:04:54,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:54,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-15 00:04:54,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 00:04:54,471 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 68 states. [2020-10-15 00:04:54,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:54,574 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-15 00:04:54,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-15 00:04:54,575 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 76 [2020-10-15 00:04:54,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:54,576 INFO L225 Difference]: With dead ends: 84 [2020-10-15 00:04:54,576 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 00:04:54,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-15 00:04:54,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 00:04:54,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-15 00:04:54,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 00:04:54,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-15 00:04:54,579 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2020-10-15 00:04:54,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:54,580 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-15 00:04:54,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-15 00:04:54,580 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-15 00:04:54,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-15 00:04:54,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:54,580 INFO L422 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:54,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-15 00:04:54,580 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:54,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:54,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2051152906, now seen corresponding path program 66 times [2020-10-15 00:04:54,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:54,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092859536] [2020-10-15 00:04:54,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:54,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:54,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:56,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:56,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-15 00:04:56,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:04:56,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2197 [2020-10-15 00:04:56,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:56,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:56,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-15 00:04:56,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:56,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-15 00:04:56,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:59,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:04:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:59,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:59,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:59,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:04:59,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:04:59,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:04:59,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:59,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:59,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:04:59,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:04:59,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:04:59,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:04:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:04:59,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092859536] [2020-10-15 00:04:59,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:04:59,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-15 00:04:59,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308399791] [2020-10-15 00:04:59,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-15 00:04:59,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:04:59,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-15 00:04:59,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 00:04:59,620 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 69 states. [2020-10-15 00:04:59,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:59,728 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-10-15 00:04:59,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-15 00:04:59,728 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 77 [2020-10-15 00:04:59,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:59,729 INFO L225 Difference]: With dead ends: 85 [2020-10-15 00:04:59,729 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 00:04:59,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 00:04:59,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 00:04:59,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-15 00:04:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 00:04:59,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-15 00:04:59,732 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2020-10-15 00:04:59,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:59,732 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-15 00:04:59,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-15 00:04:59,732 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-15 00:04:59,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-15 00:04:59,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:59,733 INFO L422 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:59,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-15 00:04:59,733 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:59,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:59,733 INFO L82 PathProgramCache]: Analyzing trace with hash 874307114, now seen corresponding path program 67 times [2020-10-15 00:04:59,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:59,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269829376] [2020-10-15 00:04:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:59,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:59,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:02,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:02,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-15 00:05:02,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:02,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2376 [2020-10-15 00:05:02,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:02,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:02,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-15 00:05:02,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:02,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-15 00:05:02,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:05,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:05,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:05,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:05,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:05,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:05,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:05,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:05,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:05,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:05,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:05,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:05,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:05,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269829376] [2020-10-15 00:05:05,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:05,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-15 00:05:05,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206904015] [2020-10-15 00:05:05,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-15 00:05:05,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:05,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-15 00:05:05,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 00:05:05,078 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 70 states. [2020-10-15 00:05:05,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:05,189 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-10-15 00:05:05,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-15 00:05:05,191 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 78 [2020-10-15 00:05:05,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:05,192 INFO L225 Difference]: With dead ends: 86 [2020-10-15 00:05:05,193 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 00:05:05,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 00:05:05,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 00:05:05,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-15 00:05:05,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 00:05:05,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-15 00:05:05,196 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2020-10-15 00:05:05,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:05,196 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-15 00:05:05,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-15 00:05:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-15 00:05:05,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-15 00:05:05,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:05,197 INFO L422 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:05,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-15 00:05:05,197 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:05,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:05,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1369254518, now seen corresponding path program 68 times [2020-10-15 00:05:05,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:05,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238451208] [2020-10-15 00:05:05,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:05,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:05,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:07,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:07,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-15 00:05:07,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:07,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2445 [2020-10-15 00:05:07,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:07,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:07,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-15 00:05:07,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:07,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-15 00:05:07,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:10,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:10,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:10,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:10,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:10,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:10,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:10,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:10,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:10,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:10,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:10,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:10,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:10,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238451208] [2020-10-15 00:05:10,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:10,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-15 00:05:10,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519933012] [2020-10-15 00:05:10,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-15 00:05:10,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:10,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-15 00:05:10,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 00:05:10,714 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 71 states. [2020-10-15 00:05:10,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:10,823 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-10-15 00:05:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-15 00:05:10,824 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 79 [2020-10-15 00:05:10,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:10,825 INFO L225 Difference]: With dead ends: 87 [2020-10-15 00:05:10,825 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 00:05:10,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 00:05:10,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 00:05:10,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-15 00:05:10,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 00:05:10,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-15 00:05:10,828 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2020-10-15 00:05:10,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:10,828 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-15 00:05:10,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-15 00:05:10,828 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-15 00:05:10,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-15 00:05:10,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:10,829 INFO L422 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:10,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-15 00:05:10,829 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:10,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:10,829 INFO L82 PathProgramCache]: Analyzing trace with hash -467245142, now seen corresponding path program 69 times [2020-10-15 00:05:10,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:10,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126121007] [2020-10-15 00:05:10,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:10,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:10,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:13,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:13,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-15 00:05:13,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:13,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2612 [2020-10-15 00:05:13,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:13,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:13,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-15 00:05:13,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:13,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-15 00:05:13,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:16,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:16,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:16,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:16,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:16,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:16,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:16,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:16,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:16,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:16,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:16,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:16,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:16,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126121007] [2020-10-15 00:05:16,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:16,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-15 00:05:16,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045331339] [2020-10-15 00:05:16,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-15 00:05:16,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:16,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-15 00:05:16,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 00:05:16,675 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 72 states. [2020-10-15 00:05:16,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:16,786 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-15 00:05:16,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-15 00:05:16,787 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 80 [2020-10-15 00:05:16,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:16,788 INFO L225 Difference]: With dead ends: 88 [2020-10-15 00:05:16,788 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 00:05:16,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-15 00:05:16,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 00:05:16,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-15 00:05:16,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 00:05:16,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-15 00:05:16,792 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2020-10-15 00:05:16,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:16,792 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-15 00:05:16,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-15 00:05:16,793 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-15 00:05:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-15 00:05:16,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:16,793 INFO L422 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:16,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-15 00:05:16,794 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:16,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:16,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1564159754, now seen corresponding path program 70 times [2020-10-15 00:05:16,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:16,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744089077] [2020-10-15 00:05:16,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:16,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:16,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:19,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:19,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-15 00:05:19,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:19,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2672 [2020-10-15 00:05:19,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:19,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:19,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-15 00:05:19,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:19,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-15 00:05:19,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:22,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:22,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:22,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:22,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:22,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:22,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:22,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:22,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:22,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:22,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:22,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:22,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:22,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:22,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744089077] [2020-10-15 00:05:22,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:22,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-15 00:05:22,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84984214] [2020-10-15 00:05:22,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-15 00:05:22,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:22,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-15 00:05:22,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 00:05:22,687 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 73 states. [2020-10-15 00:05:22,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:22,809 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-15 00:05:22,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-15 00:05:22,810 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 81 [2020-10-15 00:05:22,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:22,811 INFO L225 Difference]: With dead ends: 89 [2020-10-15 00:05:22,811 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 00:05:22,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 00:05:22,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 00:05:22,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-15 00:05:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 00:05:22,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-15 00:05:22,815 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2020-10-15 00:05:22,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:22,815 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-15 00:05:22,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-15 00:05:22,815 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-15 00:05:22,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-15 00:05:22,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:22,816 INFO L422 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:22,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-15 00:05:22,817 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:22,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:22,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1208774358, now seen corresponding path program 71 times [2020-10-15 00:05:22,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:22,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696573454] [2020-10-15 00:05:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:22,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:23,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:26,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:26,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-15 00:05:26,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:26,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3712 [2020-10-15 00:05:26,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:26,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:26,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-15 00:05:26,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:26,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-15 00:05:26,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:29,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:29,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:29,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:29,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:29,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:29,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:29,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:29,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:29,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:29,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:29,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:29,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:29,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696573454] [2020-10-15 00:05:29,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:29,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-15 00:05:29,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862631550] [2020-10-15 00:05:29,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-15 00:05:29,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:29,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-15 00:05:29,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 00:05:29,949 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 74 states. [2020-10-15 00:05:30,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:30,077 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-15 00:05:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-15 00:05:30,078 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 82 [2020-10-15 00:05:30,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:30,078 INFO L225 Difference]: With dead ends: 90 [2020-10-15 00:05:30,078 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 00:05:30,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-15 00:05:30,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 00:05:30,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-15 00:05:30,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 00:05:30,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-15 00:05:30,082 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 82 [2020-10-15 00:05:30,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:30,083 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-15 00:05:30,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-15 00:05:30,083 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-15 00:05:30,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-15 00:05:30,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:30,084 INFO L422 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:30,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-15 00:05:30,084 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:30,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:30,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1218238326, now seen corresponding path program 72 times [2020-10-15 00:05:30,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:30,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841070895] [2020-10-15 00:05:30,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:30,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:30,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:32,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:32,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-15 00:05:32,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:32,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2907 [2020-10-15 00:05:32,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:32,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-15 00:05:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-15 00:05:32,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:36,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:36,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:36,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:36,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:36,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:36,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:36,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:36,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:36,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:36,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:36,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:36,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:36,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841070895] [2020-10-15 00:05:36,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:36,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-15 00:05:36,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706382786] [2020-10-15 00:05:36,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-15 00:05:36,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:36,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-15 00:05:36,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 00:05:36,440 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 75 states. [2020-10-15 00:05:36,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:36,585 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2020-10-15 00:05:36,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-15 00:05:36,586 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 83 [2020-10-15 00:05:36,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:36,586 INFO L225 Difference]: With dead ends: 91 [2020-10-15 00:05:36,587 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 00:05:36,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 00:05:36,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 00:05:36,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-15 00:05:36,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 00:05:36,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-15 00:05:36,590 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2020-10-15 00:05:36,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:36,591 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-15 00:05:36,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-15 00:05:36,591 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-15 00:05:36,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-15 00:05:36,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:36,592 INFO L422 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:36,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-15 00:05:36,592 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:36,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:36,592 INFO L82 PathProgramCache]: Analyzing trace with hash -853779798, now seen corresponding path program 73 times [2020-10-15 00:05:36,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:36,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245405803] [2020-10-15 00:05:36,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:36,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:36,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:39,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:39,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-15 00:05:39,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:39,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2988 [2020-10-15 00:05:39,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:39,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:39,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 75 [2020-10-15 00:05:39,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:39,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-15 00:05:39,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:43,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:43,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:43,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:43,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:43,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:43,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:43,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:43,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:43,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:43,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:43,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:43,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:43,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245405803] [2020-10-15 00:05:43,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:43,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-15 00:05:43,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173723062] [2020-10-15 00:05:43,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-15 00:05:43,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:43,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-15 00:05:43,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-15 00:05:43,149 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 76 states. [2020-10-15 00:05:43,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:43,294 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-10-15 00:05:43,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-15 00:05:43,295 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 84 [2020-10-15 00:05:43,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:43,295 INFO L225 Difference]: With dead ends: 92 [2020-10-15 00:05:43,296 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 00:05:43,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-15 00:05:43,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 00:05:43,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-15 00:05:43,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 00:05:43,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-15 00:05:43,299 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 84 [2020-10-15 00:05:43,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:43,299 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-15 00:05:43,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-15 00:05:43,300 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-15 00:05:43,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-15 00:05:43,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:43,300 INFO L422 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:43,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-15 00:05:43,301 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:43,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:43,301 INFO L82 PathProgramCache]: Analyzing trace with hash -661832202, now seen corresponding path program 74 times [2020-10-15 00:05:43,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:43,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510119243] [2020-10-15 00:05:43,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:43,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:43,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:46,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:46,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-15 00:05:46,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:46,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2968 [2020-10-15 00:05:46,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:46,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:46,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-15 00:05:46,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:46,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-15 00:05:46,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:49,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:49,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:49,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:49,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:49,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:49,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:49,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:49,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:49,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:49,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510119243] [2020-10-15 00:05:49,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:49,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-15 00:05:49,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833288033] [2020-10-15 00:05:49,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-15 00:05:49,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:49,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-15 00:05:49,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-10-15 00:05:49,927 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 77 states. [2020-10-15 00:05:50,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:50,095 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-10-15 00:05:50,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-15 00:05:50,095 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 85 [2020-10-15 00:05:50,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:50,096 INFO L225 Difference]: With dead ends: 93 [2020-10-15 00:05:50,096 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 00:05:50,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-10-15 00:05:50,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 00:05:50,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-15 00:05:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 00:05:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-15 00:05:50,099 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2020-10-15 00:05:50,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:50,100 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-15 00:05:50,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-15 00:05:50,100 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-15 00:05:50,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-15 00:05:50,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:50,100 INFO L422 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:50,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-15 00:05:50,101 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:50,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:50,101 INFO L82 PathProgramCache]: Analyzing trace with hash 993575978, now seen corresponding path program 75 times [2020-10-15 00:05:50,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:50,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605508592] [2020-10-15 00:05:50,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:50,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:50,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:53,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:53,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-15 00:05:53,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:05:53,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3143 [2020-10-15 00:05:53,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:53,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:53,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 77 [2020-10-15 00:05:53,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:05:53,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-15 00:05:53,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:57,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:57,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:57,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:57,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:57,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:57,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:05:57,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:57,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:57,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:57,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:57,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:57,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:05:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:05:57,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605508592] [2020-10-15 00:05:57,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:57,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-15 00:05:57,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985336658] [2020-10-15 00:05:57,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-15 00:05:57,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:57,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-15 00:05:57,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 00:05:57,028 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 78 states. [2020-10-15 00:05:57,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:57,194 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-15 00:05:57,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-15 00:05:57,195 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 86 [2020-10-15 00:05:57,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:57,195 INFO L225 Difference]: With dead ends: 94 [2020-10-15 00:05:57,196 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 00:05:57,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 00:05:57,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 00:05:57,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-15 00:05:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 00:05:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-15 00:05:57,199 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 86 [2020-10-15 00:05:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:57,199 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-15 00:05:57,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-15 00:05:57,199 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-15 00:05:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-15 00:05:57,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:57,200 INFO L422 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:57,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-15 00:05:57,200 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:57,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:57,201 INFO L82 PathProgramCache]: Analyzing trace with hash 771622006, now seen corresponding path program 76 times [2020-10-15 00:05:57,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:57,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024895222] [2020-10-15 00:05:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:57,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:57,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:00,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:00,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-15 00:06:00,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:06:00,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3322 [2020-10-15 00:06:00,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:00,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:00,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 78 [2020-10-15 00:06:00,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:06:00,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-15 00:06:00,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:04,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:04,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:04,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:04,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:04,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:04,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:06:04,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:04,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:04,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:04,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:04,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:04,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:04,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024895222] [2020-10-15 00:06:04,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:04,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-10-15 00:06:04,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337447999] [2020-10-15 00:06:04,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-10-15 00:06:04,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:04,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-10-15 00:06:04,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-10-15 00:06:04,376 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 79 states. [2020-10-15 00:06:04,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:04,562 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-10-15 00:06:04,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-15 00:06:04,562 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 87 [2020-10-15 00:06:04,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:04,563 INFO L225 Difference]: With dead ends: 95 [2020-10-15 00:06:04,563 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 00:06:04,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-10-15 00:06:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 00:06:04,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-15 00:06:04,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 00:06:04,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-15 00:06:04,566 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2020-10-15 00:06:04,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:04,566 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-15 00:06:04,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-10-15 00:06:04,566 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-15 00:06:04,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-15 00:06:04,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:04,567 INFO L422 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:04,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-15 00:06:04,567 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:04,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1813983830, now seen corresponding path program 77 times [2020-10-15 00:06:04,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:04,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880444006] [2020-10-15 00:06:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:04,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:04,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:08,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:08,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-15 00:06:08,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:06:08,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3433 [2020-10-15 00:06:08,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:08,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:08,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 79 [2020-10-15 00:06:08,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:06:08,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-15 00:06:08,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:12,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:12,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:12,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:12,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:12,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:12,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:12,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:12,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:12,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:12,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:12,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:12,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:12,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880444006] [2020-10-15 00:06:12,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:12,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-10-15 00:06:12,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863227622] [2020-10-15 00:06:12,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-15 00:06:12,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:12,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-15 00:06:12,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-10-15 00:06:12,059 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 80 states. [2020-10-15 00:06:12,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:12,183 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-10-15 00:06:12,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-15 00:06:12,184 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 88 [2020-10-15 00:06:12,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:12,185 INFO L225 Difference]: With dead ends: 96 [2020-10-15 00:06:12,185 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 00:06:12,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-10-15 00:06:12,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 00:06:12,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-15 00:06:12,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 00:06:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-15 00:06:12,188 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 88 [2020-10-15 00:06:12,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:12,188 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-15 00:06:12,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-15 00:06:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-15 00:06:12,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-15 00:06:12,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:12,189 INFO L422 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:12,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-15 00:06:12,190 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:12,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:12,190 INFO L82 PathProgramCache]: Analyzing trace with hash -363386122, now seen corresponding path program 78 times [2020-10-15 00:06:12,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:12,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36641188] [2020-10-15 00:06:12,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:12,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:12,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:15,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:15,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-15 00:06:15,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:06:15,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3372 [2020-10-15 00:06:15,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:15,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:15,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 80 [2020-10-15 00:06:15,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:06:15,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-15 00:06:15,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:19,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:19,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:19,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:19,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:19,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:19,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:19,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:19,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:19,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:19,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:19,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:19,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:19,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36641188] [2020-10-15 00:06:19,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:19,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-10-15 00:06:19,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733686402] [2020-10-15 00:06:19,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-10-15 00:06:19,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:19,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-10-15 00:06:19,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-10-15 00:06:19,701 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 81 states. [2020-10-15 00:06:19,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:19,853 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-10-15 00:06:19,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-15 00:06:19,854 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 89 [2020-10-15 00:06:19,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:19,855 INFO L225 Difference]: With dead ends: 97 [2020-10-15 00:06:19,855 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 00:06:19,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-10-15 00:06:19,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 00:06:19,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-15 00:06:19,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 00:06:19,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-10-15 00:06:19,858 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2020-10-15 00:06:19,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:19,859 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-10-15 00:06:19,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-10-15 00:06:19,859 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-10-15 00:06:19,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-15 00:06:19,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:19,860 INFO L422 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:19,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-15 00:06:19,860 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:19,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:19,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1655469866, now seen corresponding path program 79 times [2020-10-15 00:06:19,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:19,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918415567] [2020-10-15 00:06:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:19,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:19,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:23,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:23,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-15 00:06:23,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:06:23,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3597 [2020-10-15 00:06:23,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:23,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:23,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 81 [2020-10-15 00:06:23,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:06:23,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-15 00:06:23,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:27,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:27,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:27,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:27,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:27,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:27,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:27,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:27,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:27,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:27,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:27,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:27,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:27,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918415567] [2020-10-15 00:06:27,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:27,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-10-15 00:06:27,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33563304] [2020-10-15 00:06:27,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-15 00:06:27,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:27,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-15 00:06:27,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-10-15 00:06:27,740 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 82 states. [2020-10-15 00:06:27,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:27,928 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-15 00:06:27,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-15 00:06:27,929 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 90 [2020-10-15 00:06:27,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:27,929 INFO L225 Difference]: With dead ends: 98 [2020-10-15 00:06:27,929 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 00:06:27,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-10-15 00:06:27,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 00:06:27,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-15 00:06:27,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 00:06:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-10-15 00:06:27,932 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 90 [2020-10-15 00:06:27,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:27,933 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-10-15 00:06:27,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-15 00:06:27,933 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-10-15 00:06:27,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-15 00:06:27,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:27,933 INFO L422 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:27,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-15 00:06:27,933 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:27,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:27,934 INFO L82 PathProgramCache]: Analyzing trace with hash -184503946, now seen corresponding path program 80 times [2020-10-15 00:06:27,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:27,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996639697] [2020-10-15 00:06:27,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:27,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:28,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:31,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:31,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-15 00:06:31,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:06:31,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3696 [2020-10-15 00:06:31,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:31,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:31,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 82 [2020-10-15 00:06:31,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:06:31,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-15 00:06:31,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:36,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:36,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:36,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:36,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:36,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:36,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:36,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:36,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:36,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:36,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:36,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:36,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:36,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996639697] [2020-10-15 00:06:36,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:36,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-10-15 00:06:36,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427687316] [2020-10-15 00:06:36,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-10-15 00:06:36,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:36,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-10-15 00:06:36,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-10-15 00:06:36,075 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 83 states. [2020-10-15 00:06:36,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:36,257 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-10-15 00:06:36,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-10-15 00:06:36,258 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 91 [2020-10-15 00:06:36,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:36,258 INFO L225 Difference]: With dead ends: 99 [2020-10-15 00:06:36,258 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 00:06:36,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-10-15 00:06:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 00:06:36,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-15 00:06:36,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 00:06:36,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-15 00:06:36,261 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2020-10-15 00:06:36,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:36,261 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-15 00:06:36,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-10-15 00:06:36,261 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-15 00:06:36,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-15 00:06:36,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:36,261 INFO L422 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:36,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-15 00:06:36,262 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:36,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:36,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1389117270, now seen corresponding path program 81 times [2020-10-15 00:06:36,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:36,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503503246] [2020-10-15 00:06:36,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:36,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:36,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:40,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:40,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-15 00:06:40,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:06:40,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3745 [2020-10-15 00:06:40,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:40,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:40,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 83 [2020-10-15 00:06:40,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:06:40,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-15 00:06:40,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:44,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:44,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:44,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:44,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:44,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:44,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:44,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:44,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:44,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:44,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:44,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:44,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:44,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503503246] [2020-10-15 00:06:44,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:44,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-10-15 00:06:44,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924161899] [2020-10-15 00:06:44,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-15 00:06:44,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:44,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-15 00:06:44,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-10-15 00:06:44,486 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 84 states. [2020-10-15 00:06:44,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:44,649 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2020-10-15 00:06:44,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-15 00:06:44,650 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 92 [2020-10-15 00:06:44,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:44,650 INFO L225 Difference]: With dead ends: 100 [2020-10-15 00:06:44,651 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 00:06:44,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-10-15 00:06:44,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 00:06:44,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-15 00:06:44,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 00:06:44,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-10-15 00:06:44,654 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2020-10-15 00:06:44,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:44,655 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-10-15 00:06:44,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-15 00:06:44,655 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-10-15 00:06:44,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-15 00:06:44,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:44,656 INFO L422 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:44,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-15 00:06:44,656 INFO L427 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:44,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:44,656 INFO L82 PathProgramCache]: Analyzing trace with hash -77424650, now seen corresponding path program 82 times [2020-10-15 00:06:44,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:44,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704612410] [2020-10-15 00:06:44,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:44,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:44,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:48,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:48,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-15 00:06:48,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:06:48,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4041 [2020-10-15 00:06:48,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:48,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:48,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 84 [2020-10-15 00:06:48,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:06:48,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-15 00:06:48,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:53,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:06:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:53,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:53,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:06:53,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:06:53,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:06:53,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:06:53,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:06:53,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:06:53,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:06:53,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:06:53,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:06:53,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:06:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:06:53,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704612410] [2020-10-15 00:06:53,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:06:53,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-10-15 00:06:53,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775763516] [2020-10-15 00:06:53,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-10-15 00:06:53,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:06:53,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-10-15 00:06:53,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-10-15 00:06:53,374 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 85 states. [2020-10-15 00:06:53,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:06:53,568 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-10-15 00:06:53,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-15 00:06:53,568 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 93 [2020-10-15 00:06:53,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:06:53,569 INFO L225 Difference]: With dead ends: 101 [2020-10-15 00:06:53,569 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 00:06:53,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-10-15 00:06:53,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 00:06:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-15 00:06:53,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 00:06:53,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-10-15 00:06:53,572 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2020-10-15 00:06:53,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:06:53,572 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-10-15 00:06:53,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-10-15 00:06:53,572 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-10-15 00:06:53,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-15 00:06:53,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:06:53,573 INFO L422 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:06:53,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-10-15 00:06:53,573 INFO L427 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:06:53,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:06:53,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1930340906, now seen corresponding path program 83 times [2020-10-15 00:06:53,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:06:53,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149062337] [2020-10-15 00:06:53,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:06:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:06:53,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:06:53,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking...