/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/Mono1_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:59:38,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:59:38,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:59:38,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:59:38,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:59:38,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:59:38,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:59:38,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:59:38,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:59:38,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:59:38,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:59:38,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:59:38,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:59:38,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:59:38,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:59:38,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:59:38,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:59:38,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:59:38,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:59:38,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:59:38,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:59:38,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:59:38,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:59:38,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:59:38,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:59:38,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:59:38,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:59:38,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:59:38,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:59:38,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:59:38,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:59:38,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:59:38,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:59:38,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:59:38,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:59:38,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:59:38,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:59:38,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:59:38,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:59:38,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:59:38,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:59:38,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 23:59:38,240 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:59:38,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:59:38,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:59:38,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:59:38,242 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:59:38,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:59:38,243 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:59:38,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:59:38,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:59:38,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:59:38,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:59:38,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:59:38,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:59:38,244 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:59:38,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:59:38,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:59:38,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:59:38,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:59:38,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:59:38,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:59:38,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:59:38,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:59:38,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:59:38,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:59:38,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:59:38,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:59:38,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:59:38,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:59:38,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:59:38,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:59:38,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:59:38,573 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:59:38,579 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:59:38,582 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:59:38,582 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:59:38,583 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c [2020-10-14 23:59:38,646 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91d69113c/0cdcfb5ce0af4c47a1dc4b99e584dd1c/FLAGb0cc60fcb [2020-10-14 23:59:39,133 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:59:39,133 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c [2020-10-14 23:59:39,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91d69113c/0cdcfb5ce0af4c47a1dc4b99e584dd1c/FLAGb0cc60fcb [2020-10-14 23:59:39,502 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91d69113c/0cdcfb5ce0af4c47a1dc4b99e584dd1c [2020-10-14 23:59:39,512 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:59:39,514 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:59:39,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:59:39,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:59:39,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:59:39,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:59:39" (1/1) ... [2020-10-14 23:59:39,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f499f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39, skipping insertion in model container [2020-10-14 23:59:39,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:59:39" (1/1) ... [2020-10-14 23:59:39,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:59:39,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:59:39,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:59:39,725 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:59:39,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:59:39,753 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:59:39,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39 WrapperNode [2020-10-14 23:59:39,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:59:39,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:59:39,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:59:39,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:59:39,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39" (1/1) ... [2020-10-14 23:59:39,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39" (1/1) ... [2020-10-14 23:59:39,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39" (1/1) ... [2020-10-14 23:59:39,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39" (1/1) ... [2020-10-14 23:59:39,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39" (1/1) ... [2020-10-14 23:59:39,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39" (1/1) ... [2020-10-14 23:59:39,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39" (1/1) ... [2020-10-14 23:59:39,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:59:39,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:59:39,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:59:39,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:59:39,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:59:39,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:59:39,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:59:39,932 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:59:39,932 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:59:39,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:59:39,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:59:39,932 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:59:39,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:59:39,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:59:40,109 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:59:40,110 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 23:59:40,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:59:40 BoogieIcfgContainer [2020-10-14 23:59:40,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:59:40,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:59:40,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:59:40,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:59:40,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:59:39" (1/3) ... [2020-10-14 23:59:40,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e43d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:59:40, skipping insertion in model container [2020-10-14 23:59:40,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39" (2/3) ... [2020-10-14 23:59:40,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e43d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:59:40, skipping insertion in model container [2020-10-14 23:59:40,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:59:40" (3/3) ... [2020-10-14 23:59:40,129 INFO L109 eAbstractionObserver]: Analyzing ICFG Mono1_1-1.c [2020-10-14 23:59:40,140 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:59:40,150 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:59:40,164 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:59:40,186 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:59:40,186 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:59:40,186 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:59:40,187 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:59:40,187 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:59:40,187 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:59:40,187 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:59:40,187 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:59:40,205 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-14 23:59:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 23:59:40,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:40,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:40,212 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:40,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:40,217 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-10-14 23:59:40,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:40,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338805269] [2020-10-14 23:59:40,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:40,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:40,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:40,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 23:59:40,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:40,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-14 23:59:40,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:40,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:40,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:40,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:59:40,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:40,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-14 23:59:40,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:40,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:40,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:40,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:40,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:40,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:59:40,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:40,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:40,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:40,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:40,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:40,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:40,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338805269] [2020-10-14 23:59:40,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:59:40,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 23:59:40,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873468927] [2020-10-14 23:59:40,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 23:59:40,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:40,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 23:59:40,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 23:59:40,416 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-10-14 23:59:40,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:40,435 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-14 23:59:40,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 23:59:40,436 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-14 23:59:40,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:40,443 INFO L225 Difference]: With dead ends: 29 [2020-10-14 23:59:40,444 INFO L226 Difference]: Without dead ends: 12 [2020-10-14 23:59:40,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 23:59:40,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-14 23:59:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-14 23:59:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-14 23:59:40,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-14 23:59:40,481 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2020-10-14 23:59:40,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:40,481 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-14 23:59:40,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 23:59:40,482 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-14 23:59:40,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 23:59:40,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:40,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:40,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:59:40,483 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:40,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:40,484 INFO L82 PathProgramCache]: Analyzing trace with hash -730736584, now seen corresponding path program 1 times [2020-10-14 23:59:40,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:40,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900784235] [2020-10-14 23:59:40,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:40,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:40,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:40,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 23:59:40,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:40,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-14 23:59:40,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:40,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:40,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:40,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:40,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:40,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:40,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:40,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:40,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:40,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:40,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:40,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:59:40,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:40,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:40,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:40,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:40,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:40,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:40,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900784235] [2020-10-14 23:59:40,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:59:40,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 23:59:40,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943264052] [2020-10-14 23:59:40,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 23:59:40,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:40,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 23:59:40,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:59:40,632 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-10-14 23:59:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:40,664 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2020-10-14 23:59:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 23:59:40,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-14 23:59:40,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:40,667 INFO L225 Difference]: With dead ends: 21 [2020-10-14 23:59:40,667 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 23:59:40,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:59:40,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 23:59:40,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 23:59:40,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 23:59:40,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-14 23:59:40,673 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-14 23:59:40,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:40,673 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-14 23:59:40,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 23:59:40,674 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-14 23:59:40,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 23:59:40,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:40,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:40,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:59:40,675 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:40,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:40,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1082855947, now seen corresponding path program 1 times [2020-10-14 23:59:40,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:40,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073872360] [2020-10-14 23:59:40,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:40,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:40,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:40,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 23:59:40,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:40,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-14 23:59:40,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:40,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:40,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:40,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:59:40,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:40,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:59:40,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:40,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:40,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:40,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:40,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:40,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:59:40,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:40,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:40,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:40,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:40,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:40,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:59:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:40,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073872360] [2020-10-14 23:59:40,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:59:40,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 23:59:40,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496620938] [2020-10-14 23:59:40,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 23:59:40,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:40,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 23:59:40,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:59:40,917 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-10-14 23:59:40,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:40,991 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-14 23:59:40,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 23:59:40,992 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-14 23:59:40,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:40,993 INFO L225 Difference]: With dead ends: 21 [2020-10-14 23:59:40,993 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 23:59:40,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:59:40,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 23:59:41,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-14 23:59:41,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 23:59:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-14 23:59:41,006 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-14 23:59:41,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:41,006 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-14 23:59:41,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 23:59:41,007 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-14 23:59:41,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 23:59:41,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:41,007 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:41,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:59:41,008 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:41,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:41,009 INFO L82 PathProgramCache]: Analyzing trace with hash -109889104, now seen corresponding path program 1 times [2020-10-14 23:59:41,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:41,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361685090] [2020-10-14 23:59:41,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:41,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:41,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:41,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:41,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 23:59:41,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:41,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-14 23:59:41,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:41,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:41,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:59:41,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:59:41,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 23:59:41,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:41,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:41,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:41,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:41,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:41,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:41,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:59:41,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:41,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:41,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:41,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:41,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:41,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:41,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361685090] [2020-10-14 23:59:41,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:41,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:59:41,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527220770] [2020-10-14 23:59:41,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:59:41,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:41,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:59:41,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:59:41,238 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-14 23:59:43,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:43,340 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-10-14 23:59:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:59:43,417 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-14 23:59:43,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:43,419 INFO L225 Difference]: With dead ends: 23 [2020-10-14 23:59:43,419 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 23:59:43,420 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 [2020-10-14 23:59:43,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 23:59:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-14 23:59:43,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 23:59:43,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-14 23:59:43,427 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-10-14 23:59:43,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:43,428 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-14 23:59:43,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:59:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-14 23:59:43,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:59:43,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:43,429 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:43,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:59:43,430 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:43,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:43,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1391623509, now seen corresponding path program 2 times [2020-10-14 23:59:43,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:43,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772548790] [2020-10-14 23:59:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:43,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:43,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:43,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:43,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:59:43,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:43,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-14 23:59:43,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:43,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:43,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:59:43,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:43,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 23:59:43,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:43,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:43,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:43,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:43,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:43,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:43,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:43,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:43,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:43,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:43,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:43,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:43,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:43,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772548790] [2020-10-14 23:59:43,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:43,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:59:43,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441988251] [2020-10-14 23:59:43,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:59:43,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:43,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:59:43,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:59:43,653 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2020-10-14 23:59:43,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:43,681 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-14 23:59:43,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:59:43,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-14 23:59:43,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:43,683 INFO L225 Difference]: With dead ends: 29 [2020-10-14 23:59:43,683 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 23:59:43,684 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 [2020-10-14 23:59:43,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 23:59:43,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-14 23:59:43,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 23:59:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-14 23:59:43,690 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-14 23:59:43,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:43,690 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-14 23:59:43,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:59:43,690 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-14 23:59:43,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:59:43,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:43,691 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:43,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:59:43,692 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:43,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:43,692 INFO L82 PathProgramCache]: Analyzing trace with hash -89745752, now seen corresponding path program 3 times [2020-10-14 23:59:43,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:43,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321897691] [2020-10-14 23:59:43,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:43,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:43,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:43,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:43,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:59:43,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:43,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-14 23:59:43,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:43,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:43,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:59:43,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:43,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:59:43,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:43,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:43,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:43,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:43,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:43,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:43,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:43,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:43,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:43,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:43,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:43,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:43,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:43,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321897691] [2020-10-14 23:59:43,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:43,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:59:43,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236170910] [2020-10-14 23:59:43,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:59:43,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:43,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:59:43,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:59:43,967 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-10-14 23:59:44,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:44,002 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-10-14 23:59:44,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:59:44,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-14 23:59:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:44,004 INFO L225 Difference]: With dead ends: 31 [2020-10-14 23:59:44,004 INFO L226 Difference]: Without dead ends: 21 [2020-10-14 23:59:44,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:59:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-14 23:59:44,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-14 23:59:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 23:59:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-14 23:59:44,010 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2020-10-14 23:59:44,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:44,011 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-14 23:59:44,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:59:44,011 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-14 23:59:44,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:59:44,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:44,012 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:44,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:59:44,012 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:44,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:44,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1179295589, now seen corresponding path program 4 times [2020-10-14 23:59:44,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:44,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508144052] [2020-10-14 23:59:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:44,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:44,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:44,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:44,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:59:44,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:44,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-14 23:59:44,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:44,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:44,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:59:44,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:44,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:59:44,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:44,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:44,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:44,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:44,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:44,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:44,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:44,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:44,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:44,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:44,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:44,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:44,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:44,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508144052] [2020-10-14 23:59:44,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:44,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:59:44,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580319974] [2020-10-14 23:59:44,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:59:44,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:44,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:59:44,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:59:44,282 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-10-14 23:59:44,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:44,331 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-14 23:59:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:59:44,332 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 23:59:44,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:44,333 INFO L225 Difference]: With dead ends: 33 [2020-10-14 23:59:44,333 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 23:59:44,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:59:44,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 23:59:44,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-14 23:59:44,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 23:59:44,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-14 23:59:44,340 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-14 23:59:44,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:44,341 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-14 23:59:44,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:59:44,341 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-14 23:59:44,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:59:44,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:44,342 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:44,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:59:44,343 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:44,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:44,343 INFO L82 PathProgramCache]: Analyzing trace with hash 957312226, now seen corresponding path program 5 times [2020-10-14 23:59:44,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:44,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803132864] [2020-10-14 23:59:44,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:44,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:44,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:44,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:44,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:59:44,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:44,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-14 23:59:44,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:44,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:44,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:59:44,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:44,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:59:44,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:44,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:44,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:44,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:44,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:44,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:44,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:44,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:44,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:44,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:44,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:44,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:44,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:44,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803132864] [2020-10-14 23:59:44,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:44,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:59:44,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929024788] [2020-10-14 23:59:44,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:59:44,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:44,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:59:44,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:59:44,736 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 7 states. [2020-10-14 23:59:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:44,797 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-14 23:59:44,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:59:44,798 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-14 23:59:44,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:44,798 INFO L225 Difference]: With dead ends: 35 [2020-10-14 23:59:44,799 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 23:59:44,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:59:44,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 23:59:44,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-14 23:59:44,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 23:59:44,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-14 23:59:44,805 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-10-14 23:59:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:44,806 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-14 23:59:44,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:59:44,806 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-14 23:59:44,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:59:44,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:44,807 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:44,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:59:44,807 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:44,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:44,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1915302113, now seen corresponding path program 6 times [2020-10-14 23:59:44,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:44,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842112516] [2020-10-14 23:59:44,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:44,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:44,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:45,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:45,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:59:45,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:45,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-14 23:59:45,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:45,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:45,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:59:45,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:45,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:59:45,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:45,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:45,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:45,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:45,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:45,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:45,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:45,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:45,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:45,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:45,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:45,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:45,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:45,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842112516] [2020-10-14 23:59:45,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:45,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:59:45,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161626264] [2020-10-14 23:59:45,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:59:45,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:45,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:59:45,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:59:45,187 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2020-10-14 23:59:45,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:45,265 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-10-14 23:59:45,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:59:45,266 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-14 23:59:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:45,267 INFO L225 Difference]: With dead ends: 37 [2020-10-14 23:59:45,267 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 23:59:45,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:59:45,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 23:59:45,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-14 23:59:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 23:59:45,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-14 23:59:45,273 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-10-14 23:59:45,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:45,273 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-14 23:59:45,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:59:45,273 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-14 23:59:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:59:45,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:45,274 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:45,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:59:45,275 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:45,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:45,275 INFO L82 PathProgramCache]: Analyzing trace with hash -833710564, now seen corresponding path program 7 times [2020-10-14 23:59:45,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:45,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925836374] [2020-10-14 23:59:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:45,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:45,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:45,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:45,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:59:45,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:45,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-14 23:59:45,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:45,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:45,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:59:45,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:45,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:59:45,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:45,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:45,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:45,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:45,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:45,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:45,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:45,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:45,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:45,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:45,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:45,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:45,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:45,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925836374] [2020-10-14 23:59:45,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:45,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:59:45,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723434014] [2020-10-14 23:59:45,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:59:45,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:45,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:59:45,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:59:45,687 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 9 states. [2020-10-14 23:59:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:45,790 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-14 23:59:45,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:59:45,790 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-14 23:59:45,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:45,791 INFO L225 Difference]: With dead ends: 39 [2020-10-14 23:59:45,791 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 23:59:45,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:59:45,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 23:59:45,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-14 23:59:45,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 23:59:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-14 23:59:45,797 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2020-10-14 23:59:45,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:45,798 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-14 23:59:45,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:59:45,798 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-14 23:59:45,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:59:45,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:45,799 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:45,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:59:45,799 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:45,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:45,800 INFO L82 PathProgramCache]: Analyzing trace with hash -806317607, now seen corresponding path program 8 times [2020-10-14 23:59:45,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:45,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482656981] [2020-10-14 23:59:45,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:45,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:45,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:46,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:46,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:59:46,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:46,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-14 23:59:46,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:46,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:46,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:59:46,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:46,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:59:46,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:46,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:46,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:46,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:46,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:46,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:46,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:46,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:46,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:46,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:46,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:46,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:46,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:46,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482656981] [2020-10-14 23:59:46,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:46,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:59:46,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956073641] [2020-10-14 23:59:46,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:59:46,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:46,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:59:46,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:59:46,373 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2020-10-14 23:59:46,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:46,496 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-10-14 23:59:46,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:59:46,496 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 23:59:46,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:46,497 INFO L225 Difference]: With dead ends: 41 [2020-10-14 23:59:46,497 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 23:59:46,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:59:46,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 23:59:46,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-14 23:59:46,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:59:46,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-14 23:59:46,503 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2020-10-14 23:59:46,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:46,503 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-14 23:59:46,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:59:46,504 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-14 23:59:46,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:59:46,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:46,505 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:46,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:59:46,505 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:46,505 INFO L82 PathProgramCache]: Analyzing trace with hash -251489706, now seen corresponding path program 9 times [2020-10-14 23:59:46,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:46,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526120908] [2020-10-14 23:59:46,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:46,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:46,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:46,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:46,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:59:46,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:46,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 481 [2020-10-14 23:59:46,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:46,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:46,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:59:46,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:46,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:59:47,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:47,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:47,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:47,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:47,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:47,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:47,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:47,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:47,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:47,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:47,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:47,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:47,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:47,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526120908] [2020-10-14 23:59:47,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:47,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:59:47,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105344892] [2020-10-14 23:59:47,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:59:47,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:47,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:59:47,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:59:47,174 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2020-10-14 23:59:47,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:47,348 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-10-14 23:59:47,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:59:47,348 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-14 23:59:47,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:47,349 INFO L225 Difference]: With dead ends: 43 [2020-10-14 23:59:47,349 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 23:59:47,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:59:47,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 23:59:47,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-14 23:59:47,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 23:59:47,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-14 23:59:47,355 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2020-10-14 23:59:47,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:47,356 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-14 23:59:47,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:59:47,356 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-14 23:59:47,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:59:47,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:47,357 INFO L422 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:47,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:59:47,357 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:47,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:47,358 INFO L82 PathProgramCache]: Analyzing trace with hash 362178451, now seen corresponding path program 10 times [2020-10-14 23:59:47,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:47,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443767555] [2020-10-14 23:59:47,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:47,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:47,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:47,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:47,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:59:47,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:47,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-14 23:59:47,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:47,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:59:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:47,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:59:47,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:47,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:47,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:47,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:47,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:47,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:47,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:47,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:47,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:47,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:47,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:47,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:47,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:47,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443767555] [2020-10-14 23:59:47,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:47,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:59:47,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806921940] [2020-10-14 23:59:47,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:59:47,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:47,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:59:47,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:59:47,946 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 12 states. [2020-10-14 23:59:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:48,113 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-10-14 23:59:48,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:59:48,114 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-14 23:59:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:48,115 INFO L225 Difference]: With dead ends: 45 [2020-10-14 23:59:48,115 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 23:59:48,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:59:48,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 23:59:48,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-14 23:59:48,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 23:59:48,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-14 23:59:48,121 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2020-10-14 23:59:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:48,121 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-14 23:59:48,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:59:48,121 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-14 23:59:48,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:59:48,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:48,122 INFO L422 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:48,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:59:48,122 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:48,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:48,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1686757776, now seen corresponding path program 11 times [2020-10-14 23:59:48,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:48,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137563452] [2020-10-14 23:59:48,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:48,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:48,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:48,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:48,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:59:48,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:48,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 561 [2020-10-14 23:59:48,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:48,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:48,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:59:48,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:48,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:59:48,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:48,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:48,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:48,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:48,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:48,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:48,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:48,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:48,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:48,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:48,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:48,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:48,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:48,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137563452] [2020-10-14 23:59:48,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:48,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:59:48,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194542943] [2020-10-14 23:59:48,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:59:48,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:48,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:59:48,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:59:48,902 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 13 states. [2020-10-14 23:59:49,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:49,101 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-14 23:59:49,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:59:49,102 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-14 23:59:49,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:49,103 INFO L225 Difference]: With dead ends: 47 [2020-10-14 23:59:49,103 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 23:59:49,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:59:49,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 23:59:49,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-14 23:59:49,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 23:59:49,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-14 23:59:49,110 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2020-10-14 23:59:49,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:49,110 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-14 23:59:49,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:59:49,111 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-14 23:59:49,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:59:49,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:49,114 INFO L422 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:49,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:59:49,114 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:49,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:49,115 INFO L82 PathProgramCache]: Analyzing trace with hash -997797811, now seen corresponding path program 12 times [2020-10-14 23:59:49,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:49,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923412389] [2020-10-14 23:59:49,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:49,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:49,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:49,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:49,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:59:49,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:49,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-14 23:59:49,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:49,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:49,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:59:49,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:49,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:59:49,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:49,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:49,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:49,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:49,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:49,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:49,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:49,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:49,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:49,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:49,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:49,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:49,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:49,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923412389] [2020-10-14 23:59:49,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:49,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:59:49,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765280176] [2020-10-14 23:59:49,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:59:49,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:49,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:59:49,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:59:49,880 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 14 states. [2020-10-14 23:59:50,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:50,105 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-10-14 23:59:50,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:59:50,105 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-14 23:59:50,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:50,106 INFO L225 Difference]: With dead ends: 49 [2020-10-14 23:59:50,106 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 23:59:50,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:59:50,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 23:59:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-14 23:59:50,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 23:59:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-14 23:59:50,117 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2020-10-14 23:59:50,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:50,118 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-14 23:59:50,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:59:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-14 23:59:50,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:59:50,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:50,120 INFO L422 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:50,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:59:50,120 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:50,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:50,121 INFO L82 PathProgramCache]: Analyzing trace with hash 419627978, now seen corresponding path program 13 times [2020-10-14 23:59:50,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:50,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922251847] [2020-10-14 23:59:50,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:50,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:50,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:50,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:50,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:59:50,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:50,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-14 23:59:50,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:50,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:59:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 23:59:50,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:50,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:50,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:50,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:50,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:50,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:50,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:50,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:50,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:50,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:50,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:50,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:50,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:50,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922251847] [2020-10-14 23:59:50,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:50,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:59:50,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288558818] [2020-10-14 23:59:50,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:59:50,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:50,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:59:50,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:59:50,915 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 15 states. [2020-10-14 23:59:51,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:51,236 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-14 23:59:51,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:59:51,237 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-14 23:59:51,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:51,238 INFO L225 Difference]: With dead ends: 51 [2020-10-14 23:59:51,238 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 23:59:51,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:59:51,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 23:59:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-14 23:59:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 23:59:51,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-14 23:59:51,253 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2020-10-14 23:59:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:51,254 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-14 23:59:51,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:59:51,257 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-14 23:59:51,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:59:51,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:51,258 INFO L422 BasicCegarLoop]: trace histogram [15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:51,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:59:51,259 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:51,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:51,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1061178375, now seen corresponding path program 14 times [2020-10-14 23:59:51,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:51,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624495155] [2020-10-14 23:59:51,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:51,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:51,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:51,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:51,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:59:51,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:51,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 570 [2020-10-14 23:59:51,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:51,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:51,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:59:51,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:51,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 23:59:51,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:52,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:52,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:52,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:52,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:52,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:52,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:52,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:52,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:52,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:52,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:52,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:52,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 42 proven. 182 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:52,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624495155] [2020-10-14 23:59:52,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:52,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:59:52,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524252138] [2020-10-14 23:59:52,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:59:52,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:52,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:59:52,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:59:52,175 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2020-10-14 23:59:52,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:52,503 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-10-14 23:59:52,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:59:52,504 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-14 23:59:52,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:52,504 INFO L225 Difference]: With dead ends: 53 [2020-10-14 23:59:52,504 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 23:59:52,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:59:52,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 23:59:52,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-14 23:59:52,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:59:52,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-14 23:59:52,516 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2020-10-14 23:59:52,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:52,516 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-14 23:59:52,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:59:52,517 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-14 23:59:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:59:52,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:52,519 INFO L422 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:52,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:59:52,521 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:52,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:52,521 INFO L82 PathProgramCache]: Analyzing trace with hash -884180732, now seen corresponding path program 15 times [2020-10-14 23:59:52,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:52,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112709377] [2020-10-14 23:59:52,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:52,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:52,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:53,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:53,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 23:59:53,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:53,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 721 [2020-10-14 23:59:53,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:53,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:53,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:59:53,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:53,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 23:59:53,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:53,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:53,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:53,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:53,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:53,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:53,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:53,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:53,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:53,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:53,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:53,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:53,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:53,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112709377] [2020-10-14 23:59:53,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:53,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:59:53,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118144616] [2020-10-14 23:59:53,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:59:53,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:53,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:59:53,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:59:53,556 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 17 states. [2020-10-14 23:59:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:53,870 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2020-10-14 23:59:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:59:53,871 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-14 23:59:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:53,871 INFO L225 Difference]: With dead ends: 55 [2020-10-14 23:59:53,872 INFO L226 Difference]: Without dead ends: 45 [2020-10-14 23:59:53,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:59:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-14 23:59:53,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-14 23:59:53,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 23:59:53,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-14 23:59:53,882 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2020-10-14 23:59:53,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:53,882 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-14 23:59:53,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:59:53,882 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-14 23:59:53,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 23:59:53,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:53,883 INFO L422 BasicCegarLoop]: trace histogram [17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:53,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:59:53,883 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:53,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:53,884 INFO L82 PathProgramCache]: Analyzing trace with hash -2063508799, now seen corresponding path program 16 times [2020-10-14 23:59:53,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:53,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591332580] [2020-10-14 23:59:53,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:53,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:54,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:54,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:54,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:59:54,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:54,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 711 [2020-10-14 23:59:54,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:54,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:54,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:59:54,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:54,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 23:59:54,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:54,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:54,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:54,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:54,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:54,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:54,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:54,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:54,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:54,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:54,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:54,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:54,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:54,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591332580] [2020-10-14 23:59:54,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:54,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:59:54,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431338151] [2020-10-14 23:59:54,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:59:54,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:54,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:59:54,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:59:54,998 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2020-10-14 23:59:55,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:55,370 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-10-14 23:59:55,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:59:55,371 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-14 23:59:55,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:55,372 INFO L225 Difference]: With dead ends: 57 [2020-10-14 23:59:55,372 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 23:59:55,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:59:55,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 23:59:55,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-14 23:59:55,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:59:55,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-14 23:59:55,384 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2020-10-14 23:59:55,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:55,384 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-14 23:59:55,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:59:55,385 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-14 23:59:55,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:59:55,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:55,385 INFO L422 BasicCegarLoop]: trace histogram [18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:55,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:59:55,386 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:55,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:55,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1526415042, now seen corresponding path program 17 times [2020-10-14 23:59:55,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:55,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964435945] [2020-10-14 23:59:55,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:55,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:55,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:56,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:56,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:59:56,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:56,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 688 [2020-10-14 23:59:56,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:56,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:56,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:59:56,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:56,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 23:59:56,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:56,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:56,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:56,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:56,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:56,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:56,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:56,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:56,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:56,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:56,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:56,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:56,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 272 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:56,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964435945] [2020-10-14 23:59:56,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:56,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:59:56,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127489954] [2020-10-14 23:59:56,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:59:56,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:56,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:59:56,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:59:56,421 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 19 states. [2020-10-14 23:59:56,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:56,808 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-10-14 23:59:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:59:56,809 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-14 23:59:56,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:56,809 INFO L225 Difference]: With dead ends: 59 [2020-10-14 23:59:56,809 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 23:59:56,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:59:56,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 23:59:56,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-14 23:59:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 23:59:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-14 23:59:56,817 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2020-10-14 23:59:56,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:56,818 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-14 23:59:56,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:59:56,818 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-14 23:59:56,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:59:56,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:56,819 INFO L422 BasicCegarLoop]: trace histogram [19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:56,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:59:56,819 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:56,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:56,819 INFO L82 PathProgramCache]: Analyzing trace with hash -775390085, now seen corresponding path program 18 times [2020-10-14 23:59:56,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:56,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938278990] [2020-10-14 23:59:56,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:56,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:56,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:57,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:57,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:59:57,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:57,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 936 [2020-10-14 23:59:57,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:57,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:57,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:59:57,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:57,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 23:59:57,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:58,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:58,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:58,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:58,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:58,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:58,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:59:58,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:58,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:58,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:58,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:58,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:58,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:58,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938278990] [2020-10-14 23:59:58,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:58,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:59:58,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787380684] [2020-10-14 23:59:58,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:59:58,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:58,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:59:58,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:59:58,141 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 20 states. [2020-10-14 23:59:58,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:58,620 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-10-14 23:59:58,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:59:58,622 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-14 23:59:58,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:58,623 INFO L225 Difference]: With dead ends: 61 [2020-10-14 23:59:58,623 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 23:59:58,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:59:58,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 23:59:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-14 23:59:58,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:59:58,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-14 23:59:58,637 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2020-10-14 23:59:58,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:58,638 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-14 23:59:58,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:59:58,638 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-14 23:59:58,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:59:58,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:58,639 INFO L422 BasicCegarLoop]: trace histogram [20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:58,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:59:58,639 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:58,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:58,639 INFO L82 PathProgramCache]: Analyzing trace with hash -594912136, now seen corresponding path program 19 times [2020-10-14 23:59:58,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:58,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114618268] [2020-10-14 23:59:58,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:58,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:58,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:59,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:59,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:59:59,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:59,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 603 [2020-10-14 23:59:59,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:59,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:59,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:59:59,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:59,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 23:59:59,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:59,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:59,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:59,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:59,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:59,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:59,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:59,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:59,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:59,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:59,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:59,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:59,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:59,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114618268] [2020-10-14 23:59:59,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:59,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:59:59,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744775647] [2020-10-14 23:59:59,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:59:59,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:59,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:59:59,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:59:59,625 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 21 states. [2020-10-15 00:00:00,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:00,102 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-10-15 00:00:00,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 00:00:00,105 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-15 00:00:00,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:00,105 INFO L225 Difference]: With dead ends: 63 [2020-10-15 00:00:00,105 INFO L226 Difference]: Without dead ends: 53 [2020-10-15 00:00:00,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:00:00,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-15 00:00:00,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-15 00:00:00,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 00:00:00,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-15 00:00:00,111 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2020-10-15 00:00:00,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:00,111 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-15 00:00:00,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 00:00:00,111 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-15 00:00:00,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-15 00:00:00,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:00,112 INFO L422 BasicCegarLoop]: trace histogram [21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:00,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-15 00:00:00,112 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:00,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:00,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1045705013, now seen corresponding path program 20 times [2020-10-15 00:00:00,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:00,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923450609] [2020-10-15 00:00:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:00,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:00,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:01,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:01,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-15 00:00:01,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:01,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 904 [2020-10-15 00:00:01,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:01,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:01,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-15 00:00:01,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:01,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-15 00:00:01,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:01,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:01,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:01,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:01,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:01,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:01,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:01,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:01,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:01,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:01,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:01,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:01,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:01,398 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:01,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923450609] [2020-10-15 00:00:01,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:01,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-15 00:00:01,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120082079] [2020-10-15 00:00:01,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 00:00:01,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:01,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 00:00:01,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:00:01,401 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 22 states. [2020-10-15 00:00:01,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:01,993 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-10-15 00:00:01,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 00:00:01,994 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-15 00:00:01,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:01,994 INFO L225 Difference]: With dead ends: 65 [2020-10-15 00:00:01,994 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 00:00:01,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:00:01,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 00:00:01,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-15 00:00:01,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 00:00:02,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-15 00:00:02,000 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2020-10-15 00:00:02,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:02,000 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-15 00:00:02,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 00:00:02,000 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-15 00:00:02,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 00:00:02,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:02,001 INFO L422 BasicCegarLoop]: trace histogram [22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:02,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-15 00:00:02,002 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:02,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:02,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1425787570, now seen corresponding path program 21 times [2020-10-15 00:00:02,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:02,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022961286] [2020-10-15 00:00:02,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:02,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:02,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:02,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:02,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-15 00:00:02,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:02,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 638 [2020-10-15 00:00:02,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:02,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:02,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-15 00:00:02,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:02,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-15 00:00:02,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:03,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:03,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:03,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:03,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:03,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:03,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:03,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:03,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:03,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:03,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:03,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:03,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:03,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022961286] [2020-10-15 00:00:03,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:03,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-15 00:00:03,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353343196] [2020-10-15 00:00:03,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 00:00:03,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:03,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 00:00:03,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:00:03,104 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 23 states. [2020-10-15 00:00:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:03,746 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2020-10-15 00:00:03,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 00:00:03,748 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-15 00:00:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:03,749 INFO L225 Difference]: With dead ends: 67 [2020-10-15 00:00:03,749 INFO L226 Difference]: Without dead ends: 57 [2020-10-15 00:00:03,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:00:03,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-15 00:00:03,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-15 00:00:03,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 00:00:03,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-15 00:00:03,754 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2020-10-15 00:00:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:03,755 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-15 00:00:03,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 00:00:03,755 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-15 00:00:03,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-15 00:00:03,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:03,756 INFO L422 BasicCegarLoop]: trace histogram [23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:03,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-15 00:00:03,756 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:03,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:03,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1612904687, now seen corresponding path program 22 times [2020-10-15 00:00:03,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:03,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457077474] [2020-10-15 00:00:03,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:03,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:03,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:04,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:04,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-15 00:00:04,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:04,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 852 [2020-10-15 00:00:04,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:04,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:04,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-15 00:00:04,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:04,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-15 00:00:04,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:05,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:05,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:05,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:05,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:05,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:05,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:05,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:05,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:05,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:05,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:05,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:05,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:05,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457077474] [2020-10-15 00:00:05,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:05,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-15 00:00:05,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401207785] [2020-10-15 00:00:05,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 00:00:05,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:05,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 00:00:05,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:00:05,125 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 24 states. [2020-10-15 00:00:05,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:05,831 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-10-15 00:00:05,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 00:00:05,832 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-15 00:00:05,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:05,832 INFO L225 Difference]: With dead ends: 69 [2020-10-15 00:00:05,833 INFO L226 Difference]: Without dead ends: 59 [2020-10-15 00:00:05,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:00:05,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-15 00:00:05,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-15 00:00:05,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 00:00:05,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-15 00:00:05,840 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2020-10-15 00:00:05,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:05,840 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-15 00:00:05,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 00:00:05,841 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-15 00:00:05,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-15 00:00:05,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:05,841 INFO L422 BasicCegarLoop]: trace histogram [24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:05,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-15 00:00:05,842 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:05,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:05,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1043827692, now seen corresponding path program 23 times [2020-10-15 00:00:05,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:05,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001791921] [2020-10-15 00:00:05,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:05,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:05,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:06,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:06,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-15 00:00:06,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:06,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 788 [2020-10-15 00:00:06,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:06,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:06,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-15 00:00:06,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:06,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-15 00:00:06,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:07,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:07,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:07,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:07,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:07,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:07,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:07,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:07,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:07,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:07,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:07,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:07,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 69 proven. 506 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:07,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001791921] [2020-10-15 00:00:07,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:07,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-15 00:00:07,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113436420] [2020-10-15 00:00:07,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 00:00:07,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:07,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 00:00:07,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:00:07,188 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 25 states. [2020-10-15 00:00:07,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:07,926 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2020-10-15 00:00:07,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 00:00:07,928 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-15 00:00:07,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:07,928 INFO L225 Difference]: With dead ends: 71 [2020-10-15 00:00:07,928 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 00:00:07,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:00:07,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 00:00:07,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-15 00:00:07,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 00:00:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-15 00:00:07,934 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 58 [2020-10-15 00:00:07,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:07,934 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-15 00:00:07,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 00:00:07,935 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-15 00:00:07,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-15 00:00:07,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:07,935 INFO L422 BasicCegarLoop]: trace histogram [25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:07,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-15 00:00:07,936 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:07,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:07,936 INFO L82 PathProgramCache]: Analyzing trace with hash -378317911, now seen corresponding path program 24 times [2020-10-15 00:00:07,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:07,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30741162] [2020-10-15 00:00:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:07,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:07,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:08,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:08,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-15 00:00:08,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:08,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1045 [2020-10-15 00:00:08,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:08,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:08,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-15 00:00:08,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:08,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-15 00:00:08,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:09,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:09,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:09,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:09,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:09,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:09,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:09,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:09,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:09,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:09,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:09,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:09,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:09,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30741162] [2020-10-15 00:00:09,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:09,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-15 00:00:09,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102576522] [2020-10-15 00:00:09,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 00:00:09,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:09,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 00:00:09,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:00:09,549 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 26 states. [2020-10-15 00:00:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:10,459 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2020-10-15 00:00:10,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 00:00:10,462 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-15 00:00:10,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:10,463 INFO L225 Difference]: With dead ends: 73 [2020-10-15 00:00:10,463 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 00:00:10,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:00:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 00:00:10,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-15 00:00:10,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 00:00:10,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-15 00:00:10,473 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2020-10-15 00:00:10,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:10,473 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-15 00:00:10,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 00:00:10,474 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-15 00:00:10,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-15 00:00:10,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:10,475 INFO L422 BasicCegarLoop]: trace histogram [26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:10,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-15 00:00:10,476 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:10,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:10,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1260642266, now seen corresponding path program 25 times [2020-10-15 00:00:10,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:10,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474294903] [2020-10-15 00:00:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:10,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:11,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:11,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:11,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-15 00:00:11,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:11,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1081 [2020-10-15 00:00:11,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:11,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:11,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-15 00:00:11,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:11,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-15 00:00:11,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:12,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:12,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:12,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:12,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:12,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:12,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:12,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:12,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:12,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:12,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:12,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:12,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:12,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474294903] [2020-10-15 00:00:12,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:12,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-15 00:00:12,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350601339] [2020-10-15 00:00:12,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 00:00:12,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:12,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 00:00:12,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:00:12,477 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 27 states. [2020-10-15 00:00:13,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:13,493 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2020-10-15 00:00:13,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 00:00:13,493 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-15 00:00:13,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:13,494 INFO L225 Difference]: With dead ends: 75 [2020-10-15 00:00:13,495 INFO L226 Difference]: Without dead ends: 65 [2020-10-15 00:00:13,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:00:13,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-15 00:00:13,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-15 00:00:13,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 00:00:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-15 00:00:13,508 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2020-10-15 00:00:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:13,509 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-15 00:00:13,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 00:00:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-15 00:00:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-15 00:00:13,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:13,510 INFO L422 BasicCegarLoop]: trace histogram [27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:13,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-15 00:00:13,510 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:13,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:13,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1229177187, now seen corresponding path program 26 times [2020-10-15 00:00:13,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:13,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221297843] [2020-10-15 00:00:13,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:13,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:13,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:14,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:14,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-15 00:00:14,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:14,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 848 [2020-10-15 00:00:14,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:14,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:14,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-15 00:00:14,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:14,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-15 00:00:14,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:15,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:15,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:15,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:15,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:15,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:15,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:15,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:15,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:15,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:15,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:15,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:15,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:15,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221297843] [2020-10-15 00:00:15,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:15,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-15 00:00:15,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909329190] [2020-10-15 00:00:15,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 00:00:15,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:15,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 00:00:15,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:00:15,066 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 28 states. [2020-10-15 00:00:16,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:16,187 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2020-10-15 00:00:16,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 00:00:16,188 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-15 00:00:16,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:16,189 INFO L225 Difference]: With dead ends: 77 [2020-10-15 00:00:16,189 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 00:00:16,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:00:16,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 00:00:16,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-15 00:00:16,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 00:00:16,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-15 00:00:16,200 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2020-10-15 00:00:16,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:16,200 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-15 00:00:16,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 00:00:16,200 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-15 00:00:16,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-15 00:00:16,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:16,201 INFO L422 BasicCegarLoop]: trace histogram [28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:16,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-15 00:00:16,201 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:16,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:16,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1648887648, now seen corresponding path program 27 times [2020-10-15 00:00:16,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:16,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992055933] [2020-10-15 00:00:16,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:16,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:16,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:17,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:17,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-15 00:00:17,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:17,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 917 [2020-10-15 00:00:17,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:17,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:17,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-15 00:00:17,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:17,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-15 00:00:17,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:17,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:17,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:17,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:17,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:17,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:17,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:17,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:17,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:17,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:17,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:17,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:17,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:17,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992055933] [2020-10-15 00:00:17,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:17,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-15 00:00:17,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057080776] [2020-10-15 00:00:17,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 00:00:17,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:17,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 00:00:17,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-15 00:00:17,865 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 29 states. [2020-10-15 00:00:18,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:18,855 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-10-15 00:00:18,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 00:00:18,856 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-15 00:00:18,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:18,856 INFO L225 Difference]: With dead ends: 79 [2020-10-15 00:00:18,857 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 00:00:18,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-15 00:00:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 00:00:18,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-15 00:00:18,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 00:00:18,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-15 00:00:18,863 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2020-10-15 00:00:18,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:18,864 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-15 00:00:18,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 00:00:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-15 00:00:18,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-15 00:00:18,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:18,865 INFO L422 BasicCegarLoop]: trace histogram [29, 27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:18,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-15 00:00:18,865 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:18,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:18,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1263714845, now seen corresponding path program 28 times [2020-10-15 00:00:18,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:18,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088861227] [2020-10-15 00:00:18,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:18,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:19,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:19,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:19,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-15 00:00:19,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:19,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 736 [2020-10-15 00:00:19,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:19,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:19,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-15 00:00:19,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:19,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-15 00:00:19,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:20,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:20,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:20,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:20,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:20,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:20,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:20,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:20,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:20,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:20,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:20,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:20,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:20,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088861227] [2020-10-15 00:00:20,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:20,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-15 00:00:20,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759029413] [2020-10-15 00:00:20,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 00:00:20,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:20,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 00:00:20,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:00:20,388 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 30 states. [2020-10-15 00:00:21,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:21,426 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-10-15 00:00:21,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 00:00:21,427 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-10-15 00:00:21,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:21,428 INFO L225 Difference]: With dead ends: 81 [2020-10-15 00:00:21,428 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 00:00:21,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:00:21,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 00:00:21,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-15 00:00:21,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 00:00:21,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-15 00:00:21,434 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2020-10-15 00:00:21,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:21,434 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-15 00:00:21,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 00:00:21,434 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-15 00:00:21,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-15 00:00:21,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:21,435 INFO L422 BasicCegarLoop]: trace histogram [30, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:21,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-15 00:00:21,435 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:21,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:21,435 INFO L82 PathProgramCache]: Analyzing trace with hash 479838618, now seen corresponding path program 29 times [2020-10-15 00:00:21,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:21,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669304079] [2020-10-15 00:00:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:21,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:21,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:22,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:22,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-15 00:00:22,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:22,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 719 [2020-10-15 00:00:22,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:22,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:22,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-15 00:00:22,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:22,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-15 00:00:22,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:22,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:22,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:22,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:22,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:22,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:22,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:22,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:22,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:22,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:22,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:22,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:22,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 87 proven. 812 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:22,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669304079] [2020-10-15 00:00:22,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:22,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-15 00:00:22,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019822321] [2020-10-15 00:00:22,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 00:00:22,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:22,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 00:00:22,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-15 00:00:22,970 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 31 states. [2020-10-15 00:00:24,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:24,089 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2020-10-15 00:00:24,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 00:00:24,089 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-15 00:00:24,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:24,090 INFO L225 Difference]: With dead ends: 83 [2020-10-15 00:00:24,090 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 00:00:24,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-15 00:00:24,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 00:00:24,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-15 00:00:24,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 00:00:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-15 00:00:24,098 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2020-10-15 00:00:24,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:24,098 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-15 00:00:24,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 00:00:24,098 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-15 00:00:24,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-15 00:00:24,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:24,099 INFO L422 BasicCegarLoop]: trace histogram [31, 29, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:24,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-15 00:00:24,100 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:24,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:24,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1205938729, now seen corresponding path program 30 times [2020-10-15 00:00:24,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:24,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988527326] [2020-10-15 00:00:24,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:24,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:24,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:25,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:25,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-15 00:00:25,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:25,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 956 [2020-10-15 00:00:25,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:25,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:25,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-15 00:00:25,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:25,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-15 00:00:25,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:25,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:25,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:25,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:25,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:25,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:25,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:25,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:25,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:25,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:25,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:25,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:25,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:25,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988527326] [2020-10-15 00:00:25,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:25,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-15 00:00:25,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924839447] [2020-10-15 00:00:25,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 00:00:25,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:25,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 00:00:25,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-15 00:00:25,868 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 32 states. [2020-10-15 00:00:27,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:27,095 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2020-10-15 00:00:27,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 00:00:27,095 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-10-15 00:00:27,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:27,097 INFO L225 Difference]: With dead ends: 85 [2020-10-15 00:00:27,097 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 00:00:27,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-10-15 00:00:27,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 00:00:27,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-15 00:00:27,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 00:00:27,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-15 00:00:27,103 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2020-10-15 00:00:27,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:27,104 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-15 00:00:27,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 00:00:27,104 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-15 00:00:27,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-15 00:00:27,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:27,105 INFO L422 BasicCegarLoop]: trace histogram [32, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:27,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-15 00:00:27,105 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:27,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:27,106 INFO L82 PathProgramCache]: Analyzing trace with hash -2035298604, now seen corresponding path program 31 times [2020-10-15 00:00:27,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:27,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875302273] [2020-10-15 00:00:27,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:27,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:27,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:28,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:28,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-15 00:00:28,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:28,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1040 [2020-10-15 00:00:28,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:28,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:28,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-15 00:00:28,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:28,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-15 00:00:28,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:29,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:29,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:29,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:29,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:29,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:29,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:29,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:29,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:29,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:29,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:29,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:29,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:29,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875302273] [2020-10-15 00:00:29,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:29,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-15 00:00:29,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156749072] [2020-10-15 00:00:29,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-15 00:00:29,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:29,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-15 00:00:29,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 00:00:29,052 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 33 states. [2020-10-15 00:00:30,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:30,396 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2020-10-15 00:00:30,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 00:00:30,397 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-15 00:00:30,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:30,398 INFO L225 Difference]: With dead ends: 87 [2020-10-15 00:00:30,398 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 00:00:30,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 00:00:30,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 00:00:30,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-15 00:00:30,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 00:00:30,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-15 00:00:30,405 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2020-10-15 00:00:30,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:30,405 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-15 00:00:30,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-15 00:00:30,405 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-15 00:00:30,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-15 00:00:30,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:30,406 INFO L422 BasicCegarLoop]: trace histogram [33, 31, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:30,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-15 00:00:30,406 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:30,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:30,406 INFO L82 PathProgramCache]: Analyzing trace with hash -186221423, now seen corresponding path program 32 times [2020-10-15 00:00:30,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:30,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780525786] [2020-10-15 00:00:30,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:30,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:30,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:31,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:31,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-15 00:00:31,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:31,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1181 [2020-10-15 00:00:31,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:31,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-15 00:00:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-15 00:00:31,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:32,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:32,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:32,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:32,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:32,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:32,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:32,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:32,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:32,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:32,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:32,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:32,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 96 proven. 992 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:32,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780525786] [2020-10-15 00:00:32,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:32,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-15 00:00:32,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446632992] [2020-10-15 00:00:32,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-15 00:00:32,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:32,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-15 00:00:32,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 00:00:32,506 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 34 states. [2020-10-15 00:00:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:33,875 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2020-10-15 00:00:33,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 00:00:33,876 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-10-15 00:00:33,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:33,877 INFO L225 Difference]: With dead ends: 89 [2020-10-15 00:00:33,877 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 00:00:33,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 00:00:33,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 00:00:33,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-15 00:00:33,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 00:00:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-15 00:00:33,883 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2020-10-15 00:00:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:33,883 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-15 00:00:33,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-15 00:00:33,883 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-15 00:00:33,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-15 00:00:33,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:33,884 INFO L422 BasicCegarLoop]: trace histogram [34, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:33,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-15 00:00:33,884 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:33,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:33,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1339511026, now seen corresponding path program 33 times [2020-10-15 00:00:33,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:33,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127382605] [2020-10-15 00:00:33,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:33,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:34,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:35,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:35,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-15 00:00:35,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:35,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1397 [2020-10-15 00:00:35,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:35,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:35,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-15 00:00:35,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:35,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-15 00:00:35,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:36,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:36,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:36,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:36,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:36,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:36,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:36,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:36,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:36,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:36,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:36,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:36,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:36,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127382605] [2020-10-15 00:00:36,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:36,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-15 00:00:36,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257049607] [2020-10-15 00:00:36,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-15 00:00:36,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:36,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-15 00:00:36,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 00:00:36,258 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 35 states. [2020-10-15 00:00:37,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:37,709 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2020-10-15 00:00:37,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 00:00:37,710 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-15 00:00:37,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:37,711 INFO L225 Difference]: With dead ends: 91 [2020-10-15 00:00:37,711 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 00:00:37,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 00:00:37,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 00:00:37,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-15 00:00:37,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 00:00:37,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-15 00:00:37,717 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2020-10-15 00:00:37,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:37,718 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-15 00:00:37,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-15 00:00:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-15 00:00:37,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-15 00:00:37,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:37,719 INFO L422 BasicCegarLoop]: trace histogram [35, 33, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:37,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-15 00:00:37,719 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:37,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:37,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1549257141, now seen corresponding path program 34 times [2020-10-15 00:00:37,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:37,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020659110] [2020-10-15 00:00:37,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:37,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:37,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:39,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:39,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-15 00:00:39,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:39,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1360 [2020-10-15 00:00:39,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:39,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:39,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-15 00:00:39,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:39,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-15 00:00:39,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:40,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:40,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:40,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:40,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:40,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:40,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:40,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:40,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:40,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:40,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:40,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:40,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:40,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020659110] [2020-10-15 00:00:40,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:40,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-15 00:00:40,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159756789] [2020-10-15 00:00:40,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-15 00:00:40,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:40,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-15 00:00:40,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:00:40,095 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 36 states. [2020-10-15 00:00:41,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:41,701 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2020-10-15 00:00:41,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 00:00:41,703 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 80 [2020-10-15 00:00:41,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:41,704 INFO L225 Difference]: With dead ends: 93 [2020-10-15 00:00:41,704 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 00:00:41,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:00:41,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 00:00:41,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-15 00:00:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 00:00:41,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-15 00:00:41,713 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2020-10-15 00:00:41,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:41,713 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-15 00:00:41,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-15 00:00:41,714 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-15 00:00:41,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-15 00:00:41,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:41,714 INFO L422 BasicCegarLoop]: trace histogram [36, 34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:41,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-15 00:00:41,714 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:41,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:41,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1251810744, now seen corresponding path program 35 times [2020-10-15 00:00:41,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:41,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608214541] [2020-10-15 00:00:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:41,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:41,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:42,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:42,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-15 00:00:42,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:42,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1173 [2020-10-15 00:00:42,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:42,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:42,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-15 00:00:42,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:42,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-15 00:00:42,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:43,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:43,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:43,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:43,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:43,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:43,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:43,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:43,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:43,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:43,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:43,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:43,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 105 proven. 1190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:44,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608214541] [2020-10-15 00:00:44,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:44,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-15 00:00:44,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728687953] [2020-10-15 00:00:44,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-15 00:00:44,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:44,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-15 00:00:44,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 00:00:44,003 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 37 states. [2020-10-15 00:00:45,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:45,646 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2020-10-15 00:00:45,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 00:00:45,647 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 82 [2020-10-15 00:00:45,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:45,648 INFO L225 Difference]: With dead ends: 95 [2020-10-15 00:00:45,648 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 00:00:45,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 00:00:45,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 00:00:45,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-15 00:00:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 00:00:45,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-15 00:00:45,655 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 82 [2020-10-15 00:00:45,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:45,655 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-15 00:00:45,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-15 00:00:45,655 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-15 00:00:45,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-15 00:00:45,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:45,656 INFO L422 BasicCegarLoop]: trace histogram [37, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:45,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-15 00:00:45,656 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:45,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:45,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1126335237, now seen corresponding path program 36 times [2020-10-15 00:00:45,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:45,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438882274] [2020-10-15 00:00:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:45,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:46,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:46,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:46,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-15 00:00:46,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:46,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1321 [2020-10-15 00:00:46,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:46,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:46,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-15 00:00:46,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:46,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-15 00:00:46,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:48,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:48,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:48,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:48,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:48,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:48,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:48,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:48,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:48,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:48,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:48,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:48,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 108 proven. 1260 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:48,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438882274] [2020-10-15 00:00:48,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:48,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-15 00:00:48,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210109652] [2020-10-15 00:00:48,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-15 00:00:48,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:48,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-15 00:00:48,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 00:00:48,128 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 38 states. [2020-10-15 00:00:49,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:49,857 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2020-10-15 00:00:49,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 00:00:49,857 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 84 [2020-10-15 00:00:49,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:49,858 INFO L225 Difference]: With dead ends: 97 [2020-10-15 00:00:49,859 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 00:00:49,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 00:00:49,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 00:00:49,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-15 00:00:49,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 00:00:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-15 00:00:49,865 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 84 [2020-10-15 00:00:49,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:49,866 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-15 00:00:49,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-15 00:00:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-15 00:00:49,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-15 00:00:49,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:49,867 INFO L422 BasicCegarLoop]: trace histogram [38, 36, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:49,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-15 00:00:49,867 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:49,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:49,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1602021506, now seen corresponding path program 37 times [2020-10-15 00:00:49,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:49,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029520511] [2020-10-15 00:00:49,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:49,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:50,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:51,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:51,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-15 00:00:51,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:51,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1748 [2020-10-15 00:00:51,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:51,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:51,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-15 00:00:51,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:51,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-15 00:00:51,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:52,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:52,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:52,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:52,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:52,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:52,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:52,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:52,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:52,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:52,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:52,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:52,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1332 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:52,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029520511] [2020-10-15 00:00:52,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:52,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-15 00:00:52,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189858360] [2020-10-15 00:00:52,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-15 00:00:52,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:52,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-15 00:00:52,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 00:00:52,791 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 39 states. [2020-10-15 00:00:54,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:54,610 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2020-10-15 00:00:54,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 00:00:54,611 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 86 [2020-10-15 00:00:54,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:54,612 INFO L225 Difference]: With dead ends: 99 [2020-10-15 00:00:54,612 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 00:00:54,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 00:00:54,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 00:00:54,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-15 00:00:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 00:00:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-15 00:00:54,620 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 86 [2020-10-15 00:00:54,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:54,620 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-15 00:00:54,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-15 00:00:54,620 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-15 00:00:54,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-15 00:00:54,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:54,621 INFO L422 BasicCegarLoop]: trace histogram [39, 37, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:54,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-15 00:00:54,621 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:54,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:54,622 INFO L82 PathProgramCache]: Analyzing trace with hash -824974657, now seen corresponding path program 38 times [2020-10-15 00:00:54,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:54,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745311071] [2020-10-15 00:00:54,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:54,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:55,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:55,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:55,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-15 00:00:55,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:55,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1268 [2020-10-15 00:00:55,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:55,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:55,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-15 00:00:55,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:55,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-15 00:00:55,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:57,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:57,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:57,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:57,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:57,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:57,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:57,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:57,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:57,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:57,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:57,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:57,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 114 proven. 1406 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:57,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745311071] [2020-10-15 00:00:57,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:57,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-15 00:00:57,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889584766] [2020-10-15 00:00:57,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-15 00:00:57,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:57,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-15 00:00:57,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 00:00:57,167 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 40 states. [2020-10-15 00:00:59,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:59,092 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2020-10-15 00:00:59,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 00:00:59,092 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 88 [2020-10-15 00:00:59,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:59,094 INFO L225 Difference]: With dead ends: 101 [2020-10-15 00:00:59,094 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 00:00:59,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 00:00:59,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 00:00:59,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-15 00:00:59,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 00:00:59,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-15 00:00:59,101 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 88 [2020-10-15 00:00:59,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:59,102 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-15 00:00:59,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-15 00:00:59,102 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-15 00:00:59,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-15 00:00:59,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:59,103 INFO L422 BasicCegarLoop]: trace histogram [40, 38, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:59,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-15 00:00:59,103 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:59,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:59,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1001045572, now seen corresponding path program 39 times [2020-10-15 00:00:59,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:59,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966761335] [2020-10-15 00:00:59,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:59,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:59,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:00,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:00,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-15 00:01:00,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:00,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1815 [2020-10-15 00:01:00,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:00,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:00,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-15 00:01:00,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:00,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-15 00:01:00,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:02,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:02,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:02,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:02,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:02,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:02,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:02,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:02,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:02,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:02,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:02,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:02,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 117 proven. 1482 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:01:02,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966761335] [2020-10-15 00:01:02,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:02,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-15 00:01:02,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639184869] [2020-10-15 00:01:02,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-15 00:01:02,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:02,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-15 00:01:02,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 00:01:02,248 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 41 states. [2020-10-15 00:01:04,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:04,279 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2020-10-15 00:01:04,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 00:01:04,279 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2020-10-15 00:01:04,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:04,280 INFO L225 Difference]: With dead ends: 103 [2020-10-15 00:01:04,280 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 00:01:04,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 00:01:04,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 00:01:04,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-15 00:01:04,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 00:01:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-10-15 00:01:04,288 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 90 [2020-10-15 00:01:04,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:04,288 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-10-15 00:01:04,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-15 00:01:04,288 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-10-15 00:01:04,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-15 00:01:04,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:04,290 INFO L422 BasicCegarLoop]: trace histogram [41, 39, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:04,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-15 00:01:04,290 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:04,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:04,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1593496953, now seen corresponding path program 40 times [2020-10-15 00:01:04,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:04,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843325753] [2020-10-15 00:01:04,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:04,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:04,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:05,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:05,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-15 00:01:05,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:05,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1254 [2020-10-15 00:01:05,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:05,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:05,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-15 00:01:05,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:05,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-15 00:01:05,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:06,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:06,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:06,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:06,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:06,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:06,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:06,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:06,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:06,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:06,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:06,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:06,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 120 proven. 1560 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:01:06,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843325753] [2020-10-15 00:01:06,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:06,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-15 00:01:06,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415928029] [2020-10-15 00:01:06,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-15 00:01:06,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:06,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-15 00:01:06,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 00:01:06,932 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 42 states. [2020-10-15 00:01:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:09,104 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2020-10-15 00:01:09,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 00:01:09,106 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 92 [2020-10-15 00:01:09,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:09,107 INFO L225 Difference]: With dead ends: 105 [2020-10-15 00:01:09,107 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 00:01:09,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 00:01:09,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 00:01:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-15 00:01:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 00:01:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-10-15 00:01:09,114 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2020-10-15 00:01:09,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:09,115 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-10-15 00:01:09,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-15 00:01:09,115 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-10-15 00:01:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-15 00:01:09,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:09,116 INFO L422 BasicCegarLoop]: trace histogram [42, 40, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:09,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-15 00:01:09,116 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:09,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:09,117 INFO L82 PathProgramCache]: Analyzing trace with hash -427135498, now seen corresponding path program 41 times [2020-10-15 00:01:09,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:09,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386712929] [2020-10-15 00:01:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:09,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:09,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:10,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:10,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-15 00:01:10,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:10,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1139 [2020-10-15 00:01:10,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:10,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:10,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-15 00:01:10,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:10,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-15 00:01:10,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:11,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:11,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:11,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:11,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:11,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:11,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:11,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:11,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:11,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:11,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:11,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:11,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 123 proven. 1640 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:01:11,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386712929] [2020-10-15 00:01:11,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:11,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-15 00:01:11,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750377232] [2020-10-15 00:01:11,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-15 00:01:11,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:11,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-15 00:01:11,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 00:01:11,703 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 43 states. [2020-10-15 00:01:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:13,964 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2020-10-15 00:01:13,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 00:01:13,965 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 94 [2020-10-15 00:01:13,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:13,966 INFO L225 Difference]: With dead ends: 107 [2020-10-15 00:01:13,966 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 00:01:13,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 00:01:13,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 00:01:13,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-15 00:01:13,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 00:01:13,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-10-15 00:01:13,972 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 94 [2020-10-15 00:01:13,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:13,973 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-10-15 00:01:13,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-15 00:01:13,973 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-10-15 00:01:13,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-15 00:01:13,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:13,974 INFO L422 BasicCegarLoop]: trace histogram [43, 41, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:13,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-15 00:01:13,974 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:13,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:13,974 INFO L82 PathProgramCache]: Analyzing trace with hash -929703117, now seen corresponding path program 42 times [2020-10-15 00:01:13,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:13,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740175477] [2020-10-15 00:01:13,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:13,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:15,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:15,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:15,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-15 00:01:15,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:15,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1846 [2020-10-15 00:01:15,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:15,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:15,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-15 00:01:15,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:15,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-15 00:01:15,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:17,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:17,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:17,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:17,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:17,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:17,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:17,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:17,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:17,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:17,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:17,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:17,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 126 proven. 1722 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:01:17,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740175477] [2020-10-15 00:01:17,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:17,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-15 00:01:17,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966016537] [2020-10-15 00:01:17,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-15 00:01:17,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:17,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-15 00:01:17,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 00:01:17,325 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 44 states. [2020-10-15 00:01:19,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:19,656 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2020-10-15 00:01:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 00:01:19,657 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 96 [2020-10-15 00:01:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:19,658 INFO L225 Difference]: With dead ends: 109 [2020-10-15 00:01:19,658 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 00:01:19,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 00:01:19,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 00:01:19,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-15 00:01:19,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 00:01:19,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-10-15 00:01:19,665 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2020-10-15 00:01:19,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:19,666 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-10-15 00:01:19,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-15 00:01:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-10-15 00:01:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-15 00:01:19,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:19,667 INFO L422 BasicCegarLoop]: trace histogram [44, 42, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:19,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-15 00:01:19,667 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:19,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:19,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1434119472, now seen corresponding path program 43 times [2020-10-15 00:01:19,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:19,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737508213] [2020-10-15 00:01:19,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:19,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:21,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:22,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:22,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-15 00:01:22,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:22,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2916 [2020-10-15 00:01:22,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:22,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:22,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-15 00:01:22,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:22,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-15 00:01:22,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:24,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:24,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:24,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:24,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:24,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:24,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:24,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:24,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:24,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:24,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:24,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:24,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 129 proven. 1806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:01:24,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737508213] [2020-10-15 00:01:24,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:24,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-15 00:01:24,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791204949] [2020-10-15 00:01:24,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-15 00:01:24,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:24,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-15 00:01:24,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 00:01:24,165 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 45 states. [2020-10-15 00:01:26,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:26,581 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2020-10-15 00:01:26,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 00:01:26,582 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 98 [2020-10-15 00:01:26,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:26,583 INFO L225 Difference]: With dead ends: 111 [2020-10-15 00:01:26,583 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 00:01:26,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 00:01:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 00:01:26,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-15 00:01:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 00:01:26,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2020-10-15 00:01:26,590 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2020-10-15 00:01:26,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:26,591 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2020-10-15 00:01:26,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-15 00:01:26,591 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2020-10-15 00:01:26,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-15 00:01:26,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:26,592 INFO L422 BasicCegarLoop]: trace histogram [45, 43, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:26,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-15 00:01:26,592 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:26,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:26,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1029927917, now seen corresponding path program 44 times [2020-10-15 00:01:26,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:26,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485223011] [2020-10-15 00:01:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:26,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:27,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:28,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:28,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-15 00:01:28,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:28,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1908 [2020-10-15 00:01:28,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:28,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:28,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-15 00:01:28,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:28,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-15 00:01:28,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:30,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:30,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:30,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:30,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:30,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:30,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:30,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:30,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:30,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:30,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:30,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:30,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 132 proven. 1892 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:01:30,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485223011] [2020-10-15 00:01:30,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:30,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-15 00:01:30,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322997365] [2020-10-15 00:01:30,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-15 00:01:30,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:30,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-15 00:01:30,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 00:01:30,168 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 46 states. [2020-10-15 00:01:32,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:32,701 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2020-10-15 00:01:32,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 00:01:32,702 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 100 [2020-10-15 00:01:32,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:32,703 INFO L225 Difference]: With dead ends: 113 [2020-10-15 00:01:32,703 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 00:01:32,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 00:01:32,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 00:01:32,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-15 00:01:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 00:01:32,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2020-10-15 00:01:32,710 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 100 [2020-10-15 00:01:32,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:32,710 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2020-10-15 00:01:32,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-15 00:01:32,711 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2020-10-15 00:01:32,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-15 00:01:32,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:32,711 INFO L422 BasicCegarLoop]: trace histogram [46, 44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:32,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-15 00:01:32,712 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:32,712 INFO L82 PathProgramCache]: Analyzing trace with hash -851099798, now seen corresponding path program 45 times [2020-10-15 00:01:32,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:32,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052711447] [2020-10-15 00:01:32,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:32,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:34,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:34,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:34,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-15 00:01:34,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:34,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2217 [2020-10-15 00:01:34,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:34,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:34,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-15 00:01:34,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:34,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-15 00:01:34,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:36,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:36,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:36,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:36,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:36,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:36,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:36,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:36,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:36,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:36,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:36,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:36,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 135 proven. 1980 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:01:36,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052711447] [2020-10-15 00:01:36,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:36,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-15 00:01:36,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291185443] [2020-10-15 00:01:36,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-15 00:01:36,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:36,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-15 00:01:36,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 00:01:36,662 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 47 states. [2020-10-15 00:01:39,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:39,363 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2020-10-15 00:01:39,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 00:01:39,364 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 102 [2020-10-15 00:01:39,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:39,365 INFO L225 Difference]: With dead ends: 115 [2020-10-15 00:01:39,365 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 00:01:39,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 00:01:39,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 00:01:39,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-15 00:01:39,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 00:01:39,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-10-15 00:01:39,374 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 102 [2020-10-15 00:01:39,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:39,374 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-10-15 00:01:39,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-15 00:01:39,374 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-10-15 00:01:39,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-15 00:01:39,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:39,375 INFO L422 BasicCegarLoop]: trace histogram [47, 45, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:39,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-15 00:01:39,376 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:39,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:39,376 INFO L82 PathProgramCache]: Analyzing trace with hash -337502297, now seen corresponding path program 46 times [2020-10-15 00:01:39,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:39,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799678758] [2020-10-15 00:01:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:39,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:39,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:40,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:40,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-15 00:01:40,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:40,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1283 [2020-10-15 00:01:40,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:40,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:40,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-15 00:01:40,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:40,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-15 00:01:40,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:42,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:42,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:42,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:42,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:42,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:42,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:42,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:42,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:42,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:42,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:42,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:42,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 138 proven. 2070 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:01:42,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799678758] [2020-10-15 00:01:42,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:42,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-15 00:01:42,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616801416] [2020-10-15 00:01:42,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-15 00:01:42,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:42,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-15 00:01:42,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 00:01:42,491 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 48 states. [2020-10-15 00:01:45,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:45,300 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2020-10-15 00:01:45,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 00:01:45,301 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 104 [2020-10-15 00:01:45,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:45,302 INFO L225 Difference]: With dead ends: 117 [2020-10-15 00:01:45,302 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 00:01:45,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 00:01:45,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 00:01:45,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-15 00:01:45,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-15 00:01:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2020-10-15 00:01:45,311 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 104 [2020-10-15 00:01:45,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:45,311 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2020-10-15 00:01:45,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-15 00:01:45,312 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2020-10-15 00:01:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-15 00:01:45,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:45,313 INFO L422 BasicCegarLoop]: trace histogram [48, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:45,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-15 00:01:45,313 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:45,313 INFO L82 PathProgramCache]: Analyzing trace with hash -691542876, now seen corresponding path program 47 times [2020-10-15 00:01:45,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:45,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237001418] [2020-10-15 00:01:45,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:45,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:46,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:47,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:47,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-15 00:01:47,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:47,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2213 [2020-10-15 00:01:47,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:47,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:47,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-15 00:01:47,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:47,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-15 00:01:47,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:49,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:49,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:49,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:49,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:49,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:49,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:49,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:49,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:49,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:49,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:49,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:49,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 141 proven. 2162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:01:49,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237001418] [2020-10-15 00:01:49,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:49,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-15 00:01:49,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266459461] [2020-10-15 00:01:49,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-15 00:01:49,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:49,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-15 00:01:49,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 00:01:49,417 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 49 states. [2020-10-15 00:01:52,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:52,277 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2020-10-15 00:01:52,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 00:01:52,278 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 106 [2020-10-15 00:01:52,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:52,279 INFO L225 Difference]: With dead ends: 119 [2020-10-15 00:01:52,279 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 00:01:52,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 00:01:52,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 00:01:52,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-15 00:01:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-15 00:01:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2020-10-15 00:01:52,286 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 106 [2020-10-15 00:01:52,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:52,287 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2020-10-15 00:01:52,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-15 00:01:52,287 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2020-10-15 00:01:52,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-15 00:01:52,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:52,288 INFO L422 BasicCegarLoop]: trace histogram [49, 47, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:52,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-15 00:01:52,288 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:52,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:52,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1622122911, now seen corresponding path program 48 times [2020-10-15 00:01:52,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:52,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883728366] [2020-10-15 00:01:52,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:52,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:52,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:53,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:53,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-15 00:01:53,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:53,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1322 [2020-10-15 00:01:53,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:53,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:53,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-15 00:01:53,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:53,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-15 00:01:53,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:55,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:55,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:55,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:55,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:55,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:55,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:55,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:55,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:55,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:55,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:55,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:55,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 144 proven. 2256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:01:55,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883728366] [2020-10-15 00:01:55,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:55,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-15 00:01:55,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167605378] [2020-10-15 00:01:55,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-15 00:01:55,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:55,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-15 00:01:55,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 00:01:55,577 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 50 states. [2020-10-15 00:01:58,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:58,597 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2020-10-15 00:01:58,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 00:01:58,598 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 108 [2020-10-15 00:01:58,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:58,599 INFO L225 Difference]: With dead ends: 121 [2020-10-15 00:01:58,599 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 00:01:58,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 00:01:58,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 00:01:58,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-10-15 00:01:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 00:01:58,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2020-10-15 00:01:58,607 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 108 [2020-10-15 00:01:58,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:58,607 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2020-10-15 00:01:58,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-15 00:01:58,607 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2020-10-15 00:01:58,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-15 00:01:58,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:58,608 INFO L422 BasicCegarLoop]: trace histogram [50, 48, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:58,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-15 00:01:58,608 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:58,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:58,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1738628318, now seen corresponding path program 49 times [2020-10-15 00:01:58,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:58,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665718686] [2020-10-15 00:01:58,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:58,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:58,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:00,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:00,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-15 00:02:00,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:00,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1949 [2020-10-15 00:02:00,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:00,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:00,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-15 00:02:00,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:00,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-15 00:02:00,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:02,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:02,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:02,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:02,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:02,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:02,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:02,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:02,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:02,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:02,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:02,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:02,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 147 proven. 2352 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:02:02,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665718686] [2020-10-15 00:02:02,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:02,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-15 00:02:02,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454664842] [2020-10-15 00:02:02,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-15 00:02:02,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:02,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-15 00:02:02,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 00:02:02,643 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 51 states. [2020-10-15 00:02:05,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:05,790 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2020-10-15 00:02:05,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 00:02:05,790 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 110 [2020-10-15 00:02:05,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:05,791 INFO L225 Difference]: With dead ends: 123 [2020-10-15 00:02:05,792 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 00:02:05,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 00:02:05,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 00:02:05,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-10-15 00:02:05,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-15 00:02:05,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2020-10-15 00:02:05,799 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2020-10-15 00:02:05,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:05,799 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2020-10-15 00:02:05,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-15 00:02:05,799 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2020-10-15 00:02:05,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-15 00:02:05,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:05,800 INFO L422 BasicCegarLoop]: trace histogram [51, 49, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:05,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-15 00:02:05,800 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:05,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:05,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1605152795, now seen corresponding path program 50 times [2020-10-15 00:02:05,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:05,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297096314] [2020-10-15 00:02:05,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:05,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:05,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:09,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:09,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-15 00:02:09,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:09,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3346 [2020-10-15 00:02:09,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:09,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:09,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-15 00:02:09,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:09,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-15 00:02:09,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:11,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:11,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:11,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:11,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:11,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:11,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:11,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:11,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:11,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:11,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:11,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:11,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 150 proven. 2450 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:02:11,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297096314] [2020-10-15 00:02:11,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:11,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-15 00:02:11,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117390263] [2020-10-15 00:02:11,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-15 00:02:11,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:11,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-15 00:02:11,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 00:02:11,257 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 52 states. [2020-10-15 00:02:14,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:14,442 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2020-10-15 00:02:14,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 00:02:14,443 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 112 [2020-10-15 00:02:14,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:14,444 INFO L225 Difference]: With dead ends: 125 [2020-10-15 00:02:14,444 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 00:02:14,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 00:02:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 00:02:14,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-15 00:02:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-15 00:02:14,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2020-10-15 00:02:14,452 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 112 [2020-10-15 00:02:14,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:14,452 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2020-10-15 00:02:14,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-15 00:02:14,453 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2020-10-15 00:02:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-15 00:02:14,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:14,453 INFO L422 BasicCegarLoop]: trace histogram [52, 50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:14,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-15 00:02:14,454 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:14,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:14,454 INFO L82 PathProgramCache]: Analyzing trace with hash -2110773224, now seen corresponding path program 51 times [2020-10-15 00:02:14,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:14,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341203234] [2020-10-15 00:02:14,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:14,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:15,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:18,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:18,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-15 00:02:18,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:18,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3604 [2020-10-15 00:02:18,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:18,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:18,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-15 00:02:18,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:18,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-15 00:02:18,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:20,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:20,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:20,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:20,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:20,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:20,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:20,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:20,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:20,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:20,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:20,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:20,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 153 proven. 2550 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:02:20,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341203234] [2020-10-15 00:02:20,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:20,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-15 00:02:20,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903722746] [2020-10-15 00:02:20,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-15 00:02:20,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:20,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-15 00:02:20,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 00:02:20,242 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 53 states. [2020-10-15 00:02:23,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:23,542 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2020-10-15 00:02:23,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 00:02:23,542 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2020-10-15 00:02:23,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:23,543 INFO L225 Difference]: With dead ends: 127 [2020-10-15 00:02:23,543 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 00:02:23,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 00:02:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 00:02:23,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-10-15 00:02:23,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-15 00:02:23,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2020-10-15 00:02:23,550 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 114 [2020-10-15 00:02:23,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:23,550 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2020-10-15 00:02:23,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-15 00:02:23,550 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2020-10-15 00:02:23,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-15 00:02:23,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:23,551 INFO L422 BasicCegarLoop]: trace histogram [53, 51, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:23,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-15 00:02:23,552 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:23,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:23,552 INFO L82 PathProgramCache]: Analyzing trace with hash 297112789, now seen corresponding path program 52 times [2020-10-15 00:02:23,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:23,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023929227] [2020-10-15 00:02:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:23,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:25,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:27,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:27,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-15 00:02:27,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:27,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3459 [2020-10-15 00:02:27,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:27,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:27,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-15 00:02:27,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:27,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-15 00:02:27,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:29,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:29,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:29,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:29,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:29,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:29,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:29,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:29,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:29,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:29,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:29,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:29,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 156 proven. 2652 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:02:29,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023929227] [2020-10-15 00:02:29,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:29,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-15 00:02:29,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767874113] [2020-10-15 00:02:29,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-15 00:02:29,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:29,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-15 00:02:29,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 00:02:29,389 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand 54 states. [2020-10-15 00:02:32,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:32,773 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2020-10-15 00:02:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-15 00:02:32,774 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 116 [2020-10-15 00:02:32,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:32,775 INFO L225 Difference]: With dead ends: 129 [2020-10-15 00:02:32,775 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 00:02:32,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 00:02:32,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 00:02:32,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-15 00:02:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 00:02:32,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-10-15 00:02:32,783 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2020-10-15 00:02:32,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:32,784 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-10-15 00:02:32,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-15 00:02:32,784 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-10-15 00:02:32,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-15 00:02:32,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:32,785 INFO L422 BasicCegarLoop]: trace histogram [54, 52, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:32,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-15 00:02:32,785 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:32,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:32,785 INFO L82 PathProgramCache]: Analyzing trace with hash -711801262, now seen corresponding path program 53 times [2020-10-15 00:02:32,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:32,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267310896] [2020-10-15 00:02:32,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:32,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:35,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:37,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:37,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-15 00:02:37,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:37,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-15 00:02:37,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:37,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:37,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-15 00:02:37,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:37,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-15 00:02:37,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:40,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:40,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:40,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:40,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:40,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:40,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:40,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:40,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:40,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:40,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:40,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:40,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 159 proven. 2756 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:02:40,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267310896] [2020-10-15 00:02:40,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:40,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-15 00:02:40,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656160016] [2020-10-15 00:02:40,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-15 00:02:40,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:40,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-15 00:02:40,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 00:02:40,263 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 55 states. [2020-10-15 00:02:43,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:43,878 INFO L93 Difference]: Finished difference Result 131 states and 136 transitions. [2020-10-15 00:02:43,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-15 00:02:43,879 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 118 [2020-10-15 00:02:43,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:43,880 INFO L225 Difference]: With dead ends: 131 [2020-10-15 00:02:43,880 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 00:02:43,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 00:02:43,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 00:02:43,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-15 00:02:43,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 00:02:43,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2020-10-15 00:02:43,889 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 118 [2020-10-15 00:02:43,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:43,889 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2020-10-15 00:02:43,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-15 00:02:43,889 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2020-10-15 00:02:43,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-15 00:02:43,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:43,890 INFO L422 BasicCegarLoop]: trace histogram [55, 53, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:43,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-15 00:02:43,891 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:43,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:43,891 INFO L82 PathProgramCache]: Analyzing trace with hash 384404623, now seen corresponding path program 54 times [2020-10-15 00:02:43,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:43,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273313025] [2020-10-15 00:02:43,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:43,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:44,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:46,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:46,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-15 00:02:46,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:46,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2422 [2020-10-15 00:02:46,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:46,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:46,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-15 00:02:46,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:46,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-15 00:02:46,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:48,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:48,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:48,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:48,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:48,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:48,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:48,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:48,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:48,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:48,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:48,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:48,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:48,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 162 proven. 2862 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:02:48,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273313025] [2020-10-15 00:02:48,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:48,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-15 00:02:48,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153615794] [2020-10-15 00:02:48,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-15 00:02:48,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:48,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-15 00:02:48,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 00:02:48,830 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 56 states. [2020-10-15 00:02:52,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:52,555 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2020-10-15 00:02:52,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 00:02:52,556 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 120 [2020-10-15 00:02:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:52,558 INFO L225 Difference]: With dead ends: 133 [2020-10-15 00:02:52,558 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 00:02:52,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 00:02:52,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 00:02:52,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-15 00:02:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-15 00:02:52,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2020-10-15 00:02:52,566 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 120 [2020-10-15 00:02:52,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:52,566 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2020-10-15 00:02:52,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-15 00:02:52,567 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2020-10-15 00:02:52,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-15 00:02:52,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:52,567 INFO L422 BasicCegarLoop]: trace histogram [56, 54, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:52,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-15 00:02:52,568 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:52,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:52,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1571272588, now seen corresponding path program 55 times [2020-10-15 00:02:52,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:52,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539602718] [2020-10-15 00:02:52,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:52,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:55,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:57,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:57,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-15 00:02:57,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:57,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 00:02:57,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:57,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:57,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-15 00:02:57,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:57,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-15 00:02:57,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:00,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:00,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:00,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:00,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:00,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:00,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:00,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:00,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:00,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:00,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:00,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:00,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 165 proven. 2970 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:03:00,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539602718] [2020-10-15 00:03:00,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:00,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-15 00:03:00,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127787450] [2020-10-15 00:03:00,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-15 00:03:00,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:00,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-15 00:03:00,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 00:03:00,212 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 57 states. [2020-10-15 00:03:04,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:04,002 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2020-10-15 00:03:04,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-15 00:03:04,003 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 122 [2020-10-15 00:03:04,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:04,004 INFO L225 Difference]: With dead ends: 135 [2020-10-15 00:03:04,004 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 00:03:04,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 00:03:04,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 00:03:04,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-10-15 00:03:04,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-15 00:03:04,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2020-10-15 00:03:04,012 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 122 [2020-10-15 00:03:04,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:04,012 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2020-10-15 00:03:04,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-15 00:03:04,012 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2020-10-15 00:03:04,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-15 00:03:04,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:04,013 INFO L422 BasicCegarLoop]: trace histogram [57, 55, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:04,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-15 00:03:04,014 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:04,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:04,014 INFO L82 PathProgramCache]: Analyzing trace with hash -309913783, now seen corresponding path program 56 times [2020-10-15 00:03:04,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:04,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638584543] [2020-10-15 00:03:04,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:04,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:06,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:08,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:08,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-15 00:03:08,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:08,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4298 [2020-10-15 00:03:08,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:08,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:08,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-15 00:03:08,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:08,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-15 00:03:08,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:10,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:10,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:10,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:10,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:10,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:10,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:10,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:10,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:10,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:10,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:10,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:10,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:03:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 168 proven. 3080 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:03:10,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638584543] [2020-10-15 00:03:10,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:10,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-15 00:03:10,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009350401] [2020-10-15 00:03:10,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-15 00:03:10,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:10,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-15 00:03:10,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 00:03:10,983 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 58 states. [2020-10-15 00:03:14,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:14,789 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2020-10-15 00:03:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-15 00:03:14,789 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 124 [2020-10-15 00:03:14,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:14,791 INFO L225 Difference]: With dead ends: 137 [2020-10-15 00:03:14,791 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 00:03:14,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 00:03:14,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 00:03:14,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-15 00:03:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-15 00:03:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2020-10-15 00:03:14,800 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 124 [2020-10-15 00:03:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:14,800 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2020-10-15 00:03:14,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-15 00:03:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2020-10-15 00:03:14,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-15 00:03:14,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:14,801 INFO L422 BasicCegarLoop]: trace histogram [58, 56, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:14,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-15 00:03:14,801 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:14,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:14,802 INFO L82 PathProgramCache]: Analyzing trace with hash 51215302, now seen corresponding path program 57 times [2020-10-15 00:03:14,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:14,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737054964] [2020-10-15 00:03:14,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:14,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:14,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:14,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:19,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:19,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-15 00:03:19,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:19,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-15 00:03:19,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:19,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:19,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-15 00:03:19,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:19,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-15 00:03:19,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:22,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:22,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:22,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:22,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:03:22,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:22,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:22,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:22,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:22,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:03:22,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:22,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:03:22,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 171 proven. 3192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:03:22,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737054964] [2020-10-15 00:03:22,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:22,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-15 00:03:22,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442505937] [2020-10-15 00:03:22,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-15 00:03:22,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:22,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-15 00:03:22,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 00:03:22,549 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 59 states. [2020-10-15 00:03:26,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:26,489 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2020-10-15 00:03:26,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-15 00:03:26,490 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 126 [2020-10-15 00:03:26,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:26,491 INFO L225 Difference]: With dead ends: 139 [2020-10-15 00:03:26,492 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 00:03:26,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 00:03:26,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 00:03:26,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2020-10-15 00:03:26,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 00:03:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2020-10-15 00:03:26,500 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 126 [2020-10-15 00:03:26,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:26,500 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2020-10-15 00:03:26,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-15 00:03:26,500 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2020-10-15 00:03:26,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-15 00:03:26,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:26,501 INFO L422 BasicCegarLoop]: trace histogram [59, 57, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:26,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-15 00:03:26,501 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:26,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:26,502 INFO L82 PathProgramCache]: Analyzing trace with hash -796084989, now seen corresponding path program 58 times [2020-10-15 00:03:26,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:26,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070437131] [2020-10-15 00:03:26,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:26,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:26,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:31,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:31,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-15 00:03:31,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:31,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-15 00:03:31,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:31,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:31,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-15 00:03:31,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:03:31,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-15 00:03:31,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0