/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_partial_init_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:03:17,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:03:17,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:03:17,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:03:17,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:03:17,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:03:17,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:03:17,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:03:17,196 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:03:17,197 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:03:17,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:03:17,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:03:17,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:03:17,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:03:17,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:03:17,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:03:17,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:03:17,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:03:17,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:03:17,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:03:17,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:03:17,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:03:17,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:03:17,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:03:17,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:03:17,218 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:03:17,218 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:03:17,219 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:03:17,219 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:03:17,220 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:03:17,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:03:17,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:03:17,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:03:17,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:03:17,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:03:17,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:03:17,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:03:17,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:03:17,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:03:17,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:03:17,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:03:17,227 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 18:03:17,250 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:03:17,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:03:17,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:03:17,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:03:17,252 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:03:17,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:03:17,252 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:03:17,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:03:17,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:03:17,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:03:17,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:03:17,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:03:17,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:03:17,254 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:03:17,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:03:17,254 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:03:17,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:03:17,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:03:17,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:03:17,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:03:17,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:03:17,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:03:17,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:03:17,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:03:17,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:03:17,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:03:17,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:03:17,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:03:17,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:03:17,257 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 18:03:17,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:03:17,647 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:03:17,650 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:03:17,652 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:03:17,653 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:03:17,653 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partial_init_ground.i [2020-10-14 18:03:17,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/962cdd9b9/964cf238cd3e452ba28fccb5a1d96426/FLAGaf71c7f2d [2020-10-14 18:03:18,233 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:03:18,233 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_partial_init_ground.i [2020-10-14 18:03:18,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/962cdd9b9/964cf238cd3e452ba28fccb5a1d96426/FLAGaf71c7f2d [2020-10-14 18:03:18,652 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/962cdd9b9/964cf238cd3e452ba28fccb5a1d96426 [2020-10-14 18:03:18,661 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:03:18,663 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:03:18,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:03:18,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:03:18,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:03:18,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:03:18" (1/1) ... [2020-10-14 18:03:18,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a32a894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:18, skipping insertion in model container [2020-10-14 18:03:18,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:03:18" (1/1) ... [2020-10-14 18:03:18,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:03:18,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:03:18,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:03:18,901 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:03:18,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:03:18,944 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:03:18,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:18 WrapperNode [2020-10-14 18:03:18,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:03:18,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:03:18,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:03:18,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:03:19,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:18" (1/1) ... [2020-10-14 18:03:19,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:18" (1/1) ... [2020-10-14 18:03:19,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:18" (1/1) ... [2020-10-14 18:03:19,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:18" (1/1) ... [2020-10-14 18:03:19,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:18" (1/1) ... [2020-10-14 18:03:19,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:18" (1/1) ... [2020-10-14 18:03:19,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:18" (1/1) ... [2020-10-14 18:03:19,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:03:19,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:03:19,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:03:19,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:03:19,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:18" (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 18:03:19,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:03:19,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:03:19,165 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:03:19,165 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:03:19,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:03:19,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:03:19,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 18:03:19,167 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:03:19,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:03:19,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:03:19,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:03:19,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:03:19,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:03:19,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:03:19,512 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:03:19,512 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-14 18:03:19,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:03:19 BoogieIcfgContainer [2020-10-14 18:03:19,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:03:19,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:03:19,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:03:19,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:03:19,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:03:18" (1/3) ... [2020-10-14 18:03:19,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b074565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:03:19, skipping insertion in model container [2020-10-14 18:03:19,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:18" (2/3) ... [2020-10-14 18:03:19,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b074565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:03:19, skipping insertion in model container [2020-10-14 18:03:19,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:03:19" (3/3) ... [2020-10-14 18:03:19,526 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partial_init_ground.i [2020-10-14 18:03:19,538 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:03:19,545 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:03:19,570 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:03:19,602 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:03:19,602 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:03:19,603 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:03:19,603 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:03:19,605 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:03:19,605 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:03:19,606 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:03:19,606 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:03:19,627 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-14 18:03:19,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 18:03:19,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:19,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:19,636 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:19,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:19,644 INFO L82 PathProgramCache]: Analyzing trace with hash -267634740, now seen corresponding path program 1 times [2020-10-14 18:03:19,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:19,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598450910] [2020-10-14 18:03:19,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:19,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:19,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:19,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:20,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:20,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 18:03:20,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:03:20,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-10-14 18:03:20,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:20,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:20,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:03:20,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:20,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:03:20,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 18:03:20,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:20,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:20,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:20,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:20,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:20,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:03:20,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:20,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:20,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:20,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:20,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:20,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:03:20,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598450910] [2020-10-14 18:03:20,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:03:20,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 18:03:20,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346784640] [2020-10-14 18:03:20,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:03:20,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:20,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:03:20,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:03:20,307 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-10-14 18:03:20,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:20,449 INFO L93 Difference]: Finished difference Result 68 states and 95 transitions. [2020-10-14 18:03:20,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 18:03:20,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-14 18:03:20,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:20,462 INFO L225 Difference]: With dead ends: 68 [2020-10-14 18:03:20,463 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 18:03:20,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:03:20,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 18:03:20,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-14 18:03:20,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 18:03:20,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-14 18:03:20,514 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 15 [2020-10-14 18:03:20,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:20,515 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-14 18:03:20,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:03:20,515 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-14 18:03:20,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 18:03:20,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:20,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:20,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:03:20,518 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:20,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:20,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1292276430, now seen corresponding path program 1 times [2020-10-14 18:03:20,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:20,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275184559] [2020-10-14 18:03:20,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:20,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:20,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:20,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:20,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:20,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:21,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:21,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 18:03:21,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:03:21,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 571 [2020-10-14 18:03:21,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:21,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:21,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:03:21,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:21,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 18:03:21,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:21,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:21,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:21,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:21,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:21,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:21,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:03:21,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:21,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:21,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:21,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:21,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:21,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:03:21,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275184559] [2020-10-14 18:03:21,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:21,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:03:21,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188069222] [2020-10-14 18:03:21,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:03:21,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:21,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:03:21,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:03:21,337 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 10 states. [2020-10-14 18:03:21,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:21,890 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2020-10-14 18:03:21,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:03:21,891 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-14 18:03:21,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:21,893 INFO L225 Difference]: With dead ends: 60 [2020-10-14 18:03:21,894 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 18:03:21,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:03:21,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 18:03:21,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-10-14 18:03:21,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 18:03:21,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-10-14 18:03:21,910 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 18 [2020-10-14 18:03:21,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:21,910 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-10-14 18:03:21,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:03:21,911 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-10-14 18:03:21,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 18:03:21,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:21,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:21,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:03:21,914 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:21,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:21,914 INFO L82 PathProgramCache]: Analyzing trace with hash -2096489198, now seen corresponding path program 1 times [2020-10-14 18:03:21,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:21,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248096140] [2020-10-14 18:03:21,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:21,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:21,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:21,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:22,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:22,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:22,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:22,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:22,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 18:03:22,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:03:22,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 923 [2020-10-14 18:03:22,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:22,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:22,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:03:22,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:22,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 18:03:22,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:23,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:23,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:23,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:23,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:23,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:23,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:03:23,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:23,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:23,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:23,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:23,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:23,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:03:23,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248096140] [2020-10-14 18:03:23,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:23,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:03:23,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844631562] [2020-10-14 18:03:23,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:03:23,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:23,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:03:23,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:03:23,154 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 10 states. [2020-10-14 18:03:23,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:23,443 INFO L93 Difference]: Finished difference Result 105 states and 132 transitions. [2020-10-14 18:03:23,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:03:23,444 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-14 18:03:23,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:23,448 INFO L225 Difference]: With dead ends: 105 [2020-10-14 18:03:23,448 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 18:03:23,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:03:23,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 18:03:23,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2020-10-14 18:03:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 18:03:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2020-10-14 18:03:23,463 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 20 [2020-10-14 18:03:23,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:23,464 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2020-10-14 18:03:23,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:03:23,464 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2020-10-14 18:03:23,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 18:03:23,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:23,465 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:23,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:03:23,466 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:23,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:23,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1526250361, now seen corresponding path program 1 times [2020-10-14 18:03:23,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:23,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95207962] [2020-10-14 18:03:23,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:23,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:23,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:23,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:23,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:23,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:24,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:24,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 18:03:24,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:03:24,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1147 [2020-10-14 18:03:24,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:24,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:24,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:03:24,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:24,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 18:03:24,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:24,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:24,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:24,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:24,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:24,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:24,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:03:24,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:24,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:24,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:24,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:24,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:24,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:03:24,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95207962] [2020-10-14 18:03:24,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:24,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:03:24,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365914545] [2020-10-14 18:03:24,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:03:24,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:24,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:03:24,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:03:24,858 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 12 states. [2020-10-14 18:03:25,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:25,500 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2020-10-14 18:03:25,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:03:25,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-14 18:03:25,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:25,503 INFO L225 Difference]: With dead ends: 104 [2020-10-14 18:03:25,503 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 18:03:25,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:03:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 18:03:25,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2020-10-14 18:03:25,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 18:03:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2020-10-14 18:03:25,518 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 23 [2020-10-14 18:03:25,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:25,519 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2020-10-14 18:03:25,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:03:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2020-10-14 18:03:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 18:03:25,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:25,521 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:25,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:03:25,522 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:25,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:25,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1596958149, now seen corresponding path program 1 times [2020-10-14 18:03:25,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:25,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245468256] [2020-10-14 18:03:25,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:25,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:25,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:25,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:25,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:26,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:26,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:27,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:27,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 18:03:27,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:03:27,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2334 [2020-10-14 18:03:27,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:27,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:27,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:03:27,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:27,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 18:03:27,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:28,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:28,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:28,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:28,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:28,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:28,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:28,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:28,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:28,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:28,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:28,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:28,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 18:03:28,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245468256] [2020-10-14 18:03:28,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:28,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:03:28,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278027907] [2020-10-14 18:03:28,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:03:28,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:28,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:03:28,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:03:28,034 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand 11 states. [2020-10-14 18:03:28,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:28,519 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-10-14 18:03:28,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:03:28,520 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-14 18:03:28,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:28,522 INFO L225 Difference]: With dead ends: 116 [2020-10-14 18:03:28,522 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 18:03:28,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:03:28,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 18:03:28,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 70. [2020-10-14 18:03:28,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 18:03:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2020-10-14 18:03:28,550 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 25 [2020-10-14 18:03:28,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:28,550 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2020-10-14 18:03:28,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:03:28,550 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2020-10-14 18:03:28,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 18:03:28,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:28,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:28,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:03:28,556 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:28,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:28,556 INFO L82 PathProgramCache]: Analyzing trace with hash -585840899, now seen corresponding path program 1 times [2020-10-14 18:03:28,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:28,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559953324] [2020-10-14 18:03:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:28,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:28,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:28,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:28,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:30,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:30,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:31,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:31,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 18:03:31,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:03:31,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2599 [2020-10-14 18:03:31,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:31,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:31,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:03:31,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:31,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 18:03:31,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:31,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:31,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:31,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:31,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:31,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:31,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:03:31,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:31,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:31,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:31,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:31,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:31,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:03:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:03:31,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559953324] [2020-10-14 18:03:31,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:31,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:03:31,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551945594] [2020-10-14 18:03:31,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:03:31,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:31,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:03:31,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:03:31,421 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand 11 states. [2020-10-14 18:03:32,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:32,046 INFO L93 Difference]: Finished difference Result 120 states and 148 transitions. [2020-10-14 18:03:32,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:03:32,047 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-14 18:03:32,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:32,048 INFO L225 Difference]: With dead ends: 120 [2020-10-14 18:03:32,048 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 18:03:32,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:03:32,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 18:03:32,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 73. [2020-10-14 18:03:32,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 18:03:32,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2020-10-14 18:03:32,061 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 25 [2020-10-14 18:03:32,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:32,062 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2020-10-14 18:03:32,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:03:32,062 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2020-10-14 18:03:32,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 18:03:32,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:32,064 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:32,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:03:32,065 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:32,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:32,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2021759726, now seen corresponding path program 1 times [2020-10-14 18:03:32,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:32,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147062469] [2020-10-14 18:03:32,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:32,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:32,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:32,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:32,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:32,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:33,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:33,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 18:03:33,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:03:33,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1043 [2020-10-14 18:03:33,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:33,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:33,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:03:33,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:33,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 18:03:33,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:33,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:33,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:33,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:33,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:33,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:33,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:33,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:33,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:33,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:33,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:33,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:33,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 18:03:33,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147062469] [2020-10-14 18:03:33,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:33,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:03:33,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643673865] [2020-10-14 18:03:33,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:03:33,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:33,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:03:33,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:03:33,337 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 12 states. [2020-10-14 18:03:33,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:33,680 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2020-10-14 18:03:33,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:03:33,680 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-14 18:03:33,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:33,682 INFO L225 Difference]: With dead ends: 94 [2020-10-14 18:03:33,682 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 18:03:33,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:03:33,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 18:03:33,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2020-10-14 18:03:33,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 18:03:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2020-10-14 18:03:33,694 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 26 [2020-10-14 18:03:33,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:33,694 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2020-10-14 18:03:33,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:03:33,694 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2020-10-14 18:03:33,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 18:03:33,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:33,696 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:33,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:03:33,696 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:33,696 INFO L82 PathProgramCache]: Analyzing trace with hash 542344919, now seen corresponding path program 1 times [2020-10-14 18:03:33,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:33,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724837285] [2020-10-14 18:03:33,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:33,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:33,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:33,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:34,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:34,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 18:03:34,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:03:34,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-14 18:03:34,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:34,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:34,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:03:34,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:34,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 18:03:34,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:34,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:34,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:34,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:34,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:34,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:34,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:34,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:34,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:34,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:34,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:34,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:34,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:34,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-14 18:03:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:34,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:34,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:34,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:03:34,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:34,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:03:34,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:34,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:34,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:03:34,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:34,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:03:34,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:34,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:03:34,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724837285] [2020-10-14 18:03:34,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:34,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 18:03:34,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404562094] [2020-10-14 18:03:34,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 18:03:34,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:34,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 18:03:34,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:03:34,174 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 7 states. [2020-10-14 18:03:34,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:34,325 INFO L93 Difference]: Finished difference Result 123 states and 154 transitions. [2020-10-14 18:03:34,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 18:03:34,325 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-14 18:03:34,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:34,327 INFO L225 Difference]: With dead ends: 123 [2020-10-14 18:03:34,327 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 18:03:34,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:03:34,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 18:03:34,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-14 18:03:34,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 18:03:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2020-10-14 18:03:34,338 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 28 [2020-10-14 18:03:34,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:34,338 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2020-10-14 18:03:34,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 18:03:34,338 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2020-10-14 18:03:34,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 18:03:34,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:34,340 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:34,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:03:34,340 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:34,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:34,340 INFO L82 PathProgramCache]: Analyzing trace with hash 681563096, now seen corresponding path program 2 times [2020-10-14 18:03:34,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:34,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039009720] [2020-10-14 18:03:34,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:34,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:34,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:34,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:34,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:35,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:35,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:36,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:36,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 18:03:36,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:03:36,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2043 [2020-10-14 18:03:36,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:36,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:36,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:03:36,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:36,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:03:36,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:36,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:36,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:36,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:36,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:36,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:36,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:03:36,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:36,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:36,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:36,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:36,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:36,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 18:03:36,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039009720] [2020-10-14 18:03:36,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:36,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:03:36,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499159129] [2020-10-14 18:03:36,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:03:36,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:36,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:03:36,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:03:36,746 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand 11 states. [2020-10-14 18:03:37,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:37,149 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2020-10-14 18:03:37,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:03:37,150 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-14 18:03:37,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:37,151 INFO L225 Difference]: With dead ends: 86 [2020-10-14 18:03:37,151 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 18:03:37,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:03:37,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 18:03:37,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-10-14 18:03:37,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 18:03:37,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2020-10-14 18:03:37,168 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 28 [2020-10-14 18:03:37,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:37,170 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2020-10-14 18:03:37,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:03:37,171 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2020-10-14 18:03:37,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 18:03:37,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:37,173 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:37,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:03:37,174 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:37,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:37,174 INFO L82 PathProgramCache]: Analyzing trace with hash -19501482, now seen corresponding path program 3 times [2020-10-14 18:03:37,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:37,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785337031] [2020-10-14 18:03:37,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:37,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:37,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:37,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:37,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:38,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:38,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:39,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:39,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 18:03:39,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:03:39,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2281 [2020-10-14 18:03:39,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:39,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:39,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:03:39,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:39,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:03:39,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 18:03:39,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:39,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:39,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:39,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:39,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:39,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:03:39,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:39,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:39,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:39,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:39,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:39,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:03:39,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785337031] [2020-10-14 18:03:39,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:39,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:03:39,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634567393] [2020-10-14 18:03:39,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:03:39,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:39,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:03:39,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:03:39,639 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand 12 states. [2020-10-14 18:03:39,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:39,969 INFO L93 Difference]: Finished difference Result 161 states and 201 transitions. [2020-10-14 18:03:39,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:03:39,969 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-14 18:03:39,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:39,971 INFO L225 Difference]: With dead ends: 161 [2020-10-14 18:03:39,971 INFO L226 Difference]: Without dead ends: 103 [2020-10-14 18:03:39,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:03:39,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-14 18:03:39,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2020-10-14 18:03:39,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 18:03:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2020-10-14 18:03:39,984 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 28 [2020-10-14 18:03:39,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:39,984 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2020-10-14 18:03:39,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:03:39,984 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2020-10-14 18:03:39,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 18:03:39,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:39,986 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:39,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:03:39,986 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:39,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:39,986 INFO L82 PathProgramCache]: Analyzing trace with hash 44281398, now seen corresponding path program 2 times [2020-10-14 18:03:39,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:39,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860884263] [2020-10-14 18:03:39,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:40,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:40,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:40,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:40,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:42,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:43,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:45,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:45,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 18:03:45,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:03:45,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:03:45,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:45,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:45,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:03:45,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:45,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 18:03:45,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:45,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:45,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:45,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:45,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:45,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:45,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:45,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:45,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:45,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:45,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:45,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:45,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:03:45,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860884263] [2020-10-14 18:03:45,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:45,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:03:45,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622932410] [2020-10-14 18:03:45,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:03:45,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:45,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:03:45,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:03:45,242 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand 12 states. [2020-10-14 18:03:45,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:45,578 INFO L93 Difference]: Finished difference Result 137 states and 168 transitions. [2020-10-14 18:03:45,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:03:45,578 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-14 18:03:45,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:45,580 INFO L225 Difference]: With dead ends: 137 [2020-10-14 18:03:45,580 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 18:03:45,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:03:45,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 18:03:45,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 86. [2020-10-14 18:03:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-14 18:03:45,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2020-10-14 18:03:45,596 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 30 [2020-10-14 18:03:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:45,596 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2020-10-14 18:03:45,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:03:45,596 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2020-10-14 18:03:45,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 18:03:45,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:45,597 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:45,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:03:45,598 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:45,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:45,598 INFO L82 PathProgramCache]: Analyzing trace with hash -786355970, now seen corresponding path program 2 times [2020-10-14 18:03:45,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:45,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206698378] [2020-10-14 18:03:45,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:45,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:45,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:45,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:45,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:45,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:45,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:47,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:47,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:47,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 18:03:47,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:03:47,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1625 [2020-10-14 18:03:47,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:47,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:47,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:03:47,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:47,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 18:03:47,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:03:47,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:47,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:47,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:47,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:47,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:47,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:47,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:47,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:47,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:47,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:47,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:47,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:47,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-14 18:03:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:47,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:47,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:47,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:03:47,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:47,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:03:47,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:47,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:47,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:03:47,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:47,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:03:47,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:03:47,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206698378] [2020-10-14 18:03:47,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:47,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:03:47,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746914400] [2020-10-14 18:03:47,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:03:47,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:47,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:03:47,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:03:47,381 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand 12 states. [2020-10-14 18:03:47,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:47,821 INFO L93 Difference]: Finished difference Result 126 states and 159 transitions. [2020-10-14 18:03:47,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:03:47,822 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-14 18:03:47,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:47,824 INFO L225 Difference]: With dead ends: 126 [2020-10-14 18:03:47,824 INFO L226 Difference]: Without dead ends: 124 [2020-10-14 18:03:47,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:03:47,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-14 18:03:47,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2020-10-14 18:03:47,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 18:03:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2020-10-14 18:03:47,851 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 33 [2020-10-14 18:03:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:47,851 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2020-10-14 18:03:47,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:03:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2020-10-14 18:03:47,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 18:03:47,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:47,852 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:47,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:03:47,853 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:47,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:47,853 INFO L82 PathProgramCache]: Analyzing trace with hash 2129116475, now seen corresponding path program 4 times [2020-10-14 18:03:47,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:47,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503807889] [2020-10-14 18:03:47,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:47,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:47,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:47,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:47,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:49,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:49,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:51,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:51,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 18:03:51,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:03:51,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3620 [2020-10-14 18:03:51,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:51,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:51,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:03:51,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:51,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 18:03:51,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:51,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:51,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:51,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:51,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:51,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:51,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:51,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:51,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:51,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:51,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:51,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:51,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-14 18:03:51,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503807889] [2020-10-14 18:03:51,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:51,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:03:51,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11025731] [2020-10-14 18:03:51,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:03:51,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:51,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:03:51,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:03:51,703 INFO L87 Difference]: Start difference. First operand 105 states and 135 transitions. Second operand 13 states. [2020-10-14 18:03:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:52,170 INFO L93 Difference]: Finished difference Result 185 states and 237 transitions. [2020-10-14 18:03:52,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:03:52,172 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-14 18:03:52,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:52,175 INFO L225 Difference]: With dead ends: 185 [2020-10-14 18:03:52,175 INFO L226 Difference]: Without dead ends: 183 [2020-10-14 18:03:52,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:03:52,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-14 18:03:52,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 110. [2020-10-14 18:03:52,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 18:03:52,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2020-10-14 18:03:52,196 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 33 [2020-10-14 18:03:52,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:52,196 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2020-10-14 18:03:52,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:03:52,196 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2020-10-14 18:03:52,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 18:03:52,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:52,198 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:52,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:03:52,198 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:52,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:52,199 INFO L82 PathProgramCache]: Analyzing trace with hash -577502919, now seen corresponding path program 5 times [2020-10-14 18:03:52,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:52,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729630490] [2020-10-14 18:03:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:52,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:52,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:52,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:52,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:53,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:53,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:55,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:55,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 18:03:55,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:03:55,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3627 [2020-10-14 18:03:55,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:55,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:55,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:03:55,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:55,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 18:03:55,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:56,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:56,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:56,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:56,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:56,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:56,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:03:56,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:56,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:56,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:56,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:56,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:56,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:03:56,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729630490] [2020-10-14 18:03:56,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:56,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:03:56,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857493461] [2020-10-14 18:03:56,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:03:56,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:56,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:03:56,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:03:56,080 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand 13 states. [2020-10-14 18:03:56,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:56,517 INFO L93 Difference]: Finished difference Result 143 states and 178 transitions. [2020-10-14 18:03:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:03:56,519 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-14 18:03:56,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:56,520 INFO L225 Difference]: With dead ends: 143 [2020-10-14 18:03:56,520 INFO L226 Difference]: Without dead ends: 141 [2020-10-14 18:03:56,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:03:56,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-14 18:03:56,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 78. [2020-10-14 18:03:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 18:03:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2020-10-14 18:03:56,533 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 33 [2020-10-14 18:03:56,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:56,533 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2020-10-14 18:03:56,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:03:56,533 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2020-10-14 18:03:56,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 18:03:56,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:56,534 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:56,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:03:56,535 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:56,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:56,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1636442265, now seen corresponding path program 3 times [2020-10-14 18:03:56,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:56,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707213657] [2020-10-14 18:03:56,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:56,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:56,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:56,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:56,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:57,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:58,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:58,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:58,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 18:03:58,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:03:58,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2251 [2020-10-14 18:03:58,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:58,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:58,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:03:58,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:58,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:03:58,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:58,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:58,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:58,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:58,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:58,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:58,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:58,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:58,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:58,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:58,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:58,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:58,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:58,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-14 18:03:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:58,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:58,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:58,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:03:58,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:58,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:03:58,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:58,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:58,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:03:58,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:58,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:03:58,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:03:58,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707213657] [2020-10-14 18:03:58,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:58,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:03:58,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578785315] [2020-10-14 18:03:58,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:03:58,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:58,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:03:58,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:03:58,968 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand 14 states. [2020-10-14 18:03:59,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:59,450 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2020-10-14 18:03:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:03:59,451 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-14 18:03:59,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:59,452 INFO L225 Difference]: With dead ends: 113 [2020-10-14 18:03:59,452 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 18:03:59,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:03:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 18:03:59,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 86. [2020-10-14 18:03:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-14 18:03:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2020-10-14 18:03:59,471 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 36 [2020-10-14 18:03:59,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:59,473 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2020-10-14 18:03:59,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:03:59,473 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2020-10-14 18:03:59,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 18:03:59,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:59,474 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:59,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:03:59,474 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:59,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:59,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1603715179, now seen corresponding path program 1 times [2020-10-14 18:03:59,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:59,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553120260] [2020-10-14 18:03:59,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:59,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:59,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:59,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:59,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:59,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:01,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:01,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:02,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:04,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:04,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 18:04:04,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:04:04,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4978 [2020-10-14 18:04:04,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:04,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:04,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:04:04,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:04,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:04:04,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:04,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:04,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:04,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:04,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:04,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:04,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:04,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:04,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:04,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:04,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:04,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:04,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:04,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-14 18:04:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:04,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:04,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:04,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:04,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:04,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:04,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:04,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:04,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:04,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:04,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:04,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 18:04:04,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553120260] [2020-10-14 18:04:04,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:04,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:04:04,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695004820] [2020-10-14 18:04:04,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:04:04,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:04,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:04:04,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:04:04,605 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand 13 states. [2020-10-14 18:04:05,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:05,104 INFO L93 Difference]: Finished difference Result 133 states and 166 transitions. [2020-10-14 18:04:05,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:04:05,105 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-14 18:04:05,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:05,107 INFO L225 Difference]: With dead ends: 133 [2020-10-14 18:04:05,107 INFO L226 Difference]: Without dead ends: 131 [2020-10-14 18:04:05,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:04:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-14 18:04:05,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 110. [2020-10-14 18:04:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 18:04:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 137 transitions. [2020-10-14 18:04:05,125 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 137 transitions. Word has length 38 [2020-10-14 18:04:05,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:05,125 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 137 transitions. [2020-10-14 18:04:05,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:04:05,126 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 137 transitions. [2020-10-14 18:04:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 18:04:05,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:05,126 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:05,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:04:05,127 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:05,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:05,127 INFO L82 PathProgramCache]: Analyzing trace with hash -901412370, now seen corresponding path program 2 times [2020-10-14 18:04:05,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:05,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4728842] [2020-10-14 18:04:05,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:05,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:05,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:05,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:05,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:05,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:07,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:07,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:07,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:10,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:10,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 18:04:10,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:04:10,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:04:10,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:10,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:10,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:04:10,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:10,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 18:04:10,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:10,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:10,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:10,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:10,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:10,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:10,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:10,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:10,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:10,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:10,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:10,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:10,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:10,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-14 18:04:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:10,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:10,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:10,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:10,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:10,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:04:10,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:10,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:10,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:10,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:10,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:10,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 18:04:10,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4728842] [2020-10-14 18:04:10,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:10,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:04:10,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315697074] [2020-10-14 18:04:10,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:04:10,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:10,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:04:10,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:04:10,298 INFO L87 Difference]: Start difference. First operand 110 states and 137 transitions. Second operand 14 states. [2020-10-14 18:04:10,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:10,795 INFO L93 Difference]: Finished difference Result 166 states and 204 transitions. [2020-10-14 18:04:10,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:04:10,796 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-14 18:04:10,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:10,797 INFO L225 Difference]: With dead ends: 166 [2020-10-14 18:04:10,797 INFO L226 Difference]: Without dead ends: 164 [2020-10-14 18:04:10,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:04:10,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-14 18:04:10,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 105. [2020-10-14 18:04:10,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 18:04:10,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 129 transitions. [2020-10-14 18:04:10,814 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 129 transitions. Word has length 41 [2020-10-14 18:04:10,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:10,814 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 129 transitions. [2020-10-14 18:04:10,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:04:10,814 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 129 transitions. [2020-10-14 18:04:10,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 18:04:10,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:10,815 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:10,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:04:10,816 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:10,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:10,816 INFO L82 PathProgramCache]: Analyzing trace with hash 787531372, now seen corresponding path program 3 times [2020-10-14 18:04:10,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:10,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002197520] [2020-10-14 18:04:10,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:10,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:10,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:10,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:10,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:11,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:13,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:13,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:14,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:15,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:15,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 18:04:15,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:04:15,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 18:04:15,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:15,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:15,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:04:15,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:15,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 18:04:15,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:15,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:15,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:15,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:15,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:15,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:15,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:15,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:15,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:15,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:15,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:15,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:15,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:15,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-14 18:04:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:15,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:15,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:15,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:15,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:15,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:15,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:15,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:15,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:15,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:15,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:15,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 18:04:15,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002197520] [2020-10-14 18:04:15,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:15,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:04:15,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132949895] [2020-10-14 18:04:15,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:04:15,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:15,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:04:15,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:04:16,000 INFO L87 Difference]: Start difference. First operand 105 states and 129 transitions. Second operand 15 states. [2020-10-14 18:04:16,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:16,665 INFO L93 Difference]: Finished difference Result 229 states and 294 transitions. [2020-10-14 18:04:16,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:04:16,665 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-14 18:04:16,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:16,668 INFO L225 Difference]: With dead ends: 229 [2020-10-14 18:04:16,668 INFO L226 Difference]: Without dead ends: 227 [2020-10-14 18:04:16,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:04:16,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-14 18:04:16,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 128. [2020-10-14 18:04:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-14 18:04:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 164 transitions. [2020-10-14 18:04:16,689 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 164 transitions. Word has length 41 [2020-10-14 18:04:16,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:16,690 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 164 transitions. [2020-10-14 18:04:16,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:04:16,690 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 164 transitions. [2020-10-14 18:04:16,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 18:04:16,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:16,691 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:16,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:04:16,691 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:16,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:16,692 INFO L82 PathProgramCache]: Analyzing trace with hash 95128896, now seen corresponding path program 4 times [2020-10-14 18:04:16,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:16,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616648531] [2020-10-14 18:04:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:16,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:16,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:16,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:16,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:17,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:17,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:18,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:19,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:19,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 18:04:19,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:04:19,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2357 [2020-10-14 18:04:19,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:19,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:19,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:04:19,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:19,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 18:04:19,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:19,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:19,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:19,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:19,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:19,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:19,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:19,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:19,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:19,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:19,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:19,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:19,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:19,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-14 18:04:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:19,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:19,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:19,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:19,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:19,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:04:19,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:19,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:19,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:19,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:19,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:19,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:19,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-14 18:04:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:19,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:19,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:19,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:19,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:19,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:04:19,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:19,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:19,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:19,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:19,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:19,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 18:04:19,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616648531] [2020-10-14 18:04:19,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:19,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:04:19,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663681518] [2020-10-14 18:04:19,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:04:19,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:19,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:04:19,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:04:19,239 INFO L87 Difference]: Start difference. First operand 128 states and 164 transitions. Second operand 14 states. [2020-10-14 18:04:19,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:19,925 INFO L93 Difference]: Finished difference Result 204 states and 261 transitions. [2020-10-14 18:04:19,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 18:04:19,932 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-10-14 18:04:19,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:19,934 INFO L225 Difference]: With dead ends: 204 [2020-10-14 18:04:19,934 INFO L226 Difference]: Without dead ends: 202 [2020-10-14 18:04:19,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:04:19,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-14 18:04:19,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 155. [2020-10-14 18:04:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-14 18:04:19,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 202 transitions. [2020-10-14 18:04:19,955 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 202 transitions. Word has length 44 [2020-10-14 18:04:19,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:19,956 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 202 transitions. [2020-10-14 18:04:19,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:04:19,956 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 202 transitions. [2020-10-14 18:04:19,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 18:04:19,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:19,957 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:19,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:04:19,957 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:19,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:19,958 INFO L82 PathProgramCache]: Analyzing trace with hash -115545591, now seen corresponding path program 4 times [2020-10-14 18:04:19,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:19,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391165094] [2020-10-14 18:04:19,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:19,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:19,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:19,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:20,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:20,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:22,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:22,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:24,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:24,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 18:04:24,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:04:24,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:04:24,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:24,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:24,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:04:24,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:24,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 18:04:24,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:25,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:25,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:25,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:25,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:25,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:25,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:25,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:25,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:25,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:25,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:25,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:25,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:25,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-14 18:04:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:25,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:25,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:25,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:25,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:25,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:25,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:25,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:25,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:25,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:25,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:25,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 18:04:25,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391165094] [2020-10-14 18:04:25,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:25,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:04:25,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302241558] [2020-10-14 18:04:25,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:04:25,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:25,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:04:25,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:04:25,134 INFO L87 Difference]: Start difference. First operand 155 states and 202 transitions. Second operand 15 states. [2020-10-14 18:04:25,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:25,783 INFO L93 Difference]: Finished difference Result 242 states and 313 transitions. [2020-10-14 18:04:25,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:04:25,784 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-14 18:04:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:25,787 INFO L225 Difference]: With dead ends: 242 [2020-10-14 18:04:25,787 INFO L226 Difference]: Without dead ends: 240 [2020-10-14 18:04:25,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:04:25,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-14 18:04:25,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 148. [2020-10-14 18:04:25,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-14 18:04:25,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 191 transitions. [2020-10-14 18:04:25,835 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 191 transitions. Word has length 44 [2020-10-14 18:04:25,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:25,835 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 191 transitions. [2020-10-14 18:04:25,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:04:25,835 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 191 transitions. [2020-10-14 18:04:25,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 18:04:25,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:25,837 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:25,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 18:04:25,837 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:25,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:25,837 INFO L82 PathProgramCache]: Analyzing trace with hash -334400309, now seen corresponding path program 5 times [2020-10-14 18:04:25,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:25,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125982407] [2020-10-14 18:04:25,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:25,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:25,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:25,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:25,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:26,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:29,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:29,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:30,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:30,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:30,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 18:04:30,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:04:30,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:04:30,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:30,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:30,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:04:30,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:30,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 18:04:30,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:31,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:31,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:31,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:31,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:31,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:31,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:31,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:31,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:31,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:31,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-14 18:04:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:31,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:31,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:31,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:31,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:31,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:31,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:31,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:31,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:31,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:31,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:31,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:04:31,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125982407] [2020-10-14 18:04:31,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:31,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:04:31,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560311416] [2020-10-14 18:04:31,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:04:31,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:31,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:04:31,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:04:31,054 INFO L87 Difference]: Start difference. First operand 148 states and 191 transitions. Second operand 16 states. [2020-10-14 18:04:31,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:31,559 INFO L93 Difference]: Finished difference Result 242 states and 306 transitions. [2020-10-14 18:04:31,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:04:31,561 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-10-14 18:04:31,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:31,563 INFO L225 Difference]: With dead ends: 242 [2020-10-14 18:04:31,563 INFO L226 Difference]: Without dead ends: 214 [2020-10-14 18:04:31,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:04:31,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-14 18:04:31,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 151. [2020-10-14 18:04:31,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-14 18:04:31,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 194 transitions. [2020-10-14 18:04:31,593 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 194 transitions. Word has length 44 [2020-10-14 18:04:31,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:31,593 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 194 transitions. [2020-10-14 18:04:31,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:04:31,593 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 194 transitions. [2020-10-14 18:04:31,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 18:04:31,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:31,594 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:31,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 18:04:31,595 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:31,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:31,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1285466427, now seen corresponding path program 5 times [2020-10-14 18:04:31,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:31,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634420019] [2020-10-14 18:04:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:31,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:31,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:31,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:31,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:31,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:32,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:33,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:36,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:36,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 18:04:36,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:04:36,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 18:04:36,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:36,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:36,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:04:36,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:36,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 18:04:36,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:36,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:36,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:36,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:36,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:36,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:36,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:04:36,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:36,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:36,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:36,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-14 18:04:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:36,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:36,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:36,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:36,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:36,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:36,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:36,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:36,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:36,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:36,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:36,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:36,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-14 18:04:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:36,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:36,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:36,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:36,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:36,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:36,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:36,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:36,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:36,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:36,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:36,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 18:04:36,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634420019] [2020-10-14 18:04:36,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:36,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:04:36,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040543140] [2020-10-14 18:04:36,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:04:36,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:36,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:04:36,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:04:36,835 INFO L87 Difference]: Start difference. First operand 151 states and 194 transitions. Second operand 16 states. [2020-10-14 18:04:37,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:37,541 INFO L93 Difference]: Finished difference Result 201 states and 253 transitions. [2020-10-14 18:04:37,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:04:37,542 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-10-14 18:04:37,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:37,544 INFO L225 Difference]: With dead ends: 201 [2020-10-14 18:04:37,544 INFO L226 Difference]: Without dead ends: 199 [2020-10-14 18:04:37,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:04:37,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-14 18:04:37,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 131. [2020-10-14 18:04:37,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-14 18:04:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 164 transitions. [2020-10-14 18:04:37,566 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 164 transitions. Word has length 47 [2020-10-14 18:04:37,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:37,566 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 164 transitions. [2020-10-14 18:04:37,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:04:37,566 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 164 transitions. [2020-10-14 18:04:37,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 18:04:37,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:37,567 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:37,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 18:04:37,568 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:37,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:37,568 INFO L82 PathProgramCache]: Analyzing trace with hash 68418133, now seen corresponding path program 1 times [2020-10-14 18:04:37,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:37,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624961156] [2020-10-14 18:04:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:37,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:37,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:37,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:37,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:39,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:39,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:41,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:42,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:42,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 18:04:42,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:04:42,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:04:42,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:42,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:42,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:04:42,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:42,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 18:04:42,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:42,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:42,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:42,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:42,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:42,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:42,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:42,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:42,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:42,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:42,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:42,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:42,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:04:42,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-14 18:04:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:42,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:42,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:42,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:42,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:42,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:04:42,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:42,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:42,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:42,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:42,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:42,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:04:42,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-14 18:04:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:42,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:42,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:42,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:42,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:42,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:04:42,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:42,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:42,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:42,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:42,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:42,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:04:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 18:04:42,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624961156] [2020-10-14 18:04:42,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:42,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:04:42,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336230687] [2020-10-14 18:04:42,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:04:42,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:42,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:04:42,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:04:42,766 INFO L87 Difference]: Start difference. First operand 131 states and 164 transitions. Second operand 13 states. [2020-10-14 18:04:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:43,271 INFO L93 Difference]: Finished difference Result 179 states and 221 transitions. [2020-10-14 18:04:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:04:43,272 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-14 18:04:43,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:43,274 INFO L225 Difference]: With dead ends: 179 [2020-10-14 18:04:43,274 INFO L226 Difference]: Without dead ends: 177 [2020-10-14 18:04:43,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:04:43,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-14 18:04:43,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 123. [2020-10-14 18:04:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 18:04:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 153 transitions. [2020-10-14 18:04:43,308 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 153 transitions. Word has length 49 [2020-10-14 18:04:43,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:43,308 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 153 transitions. [2020-10-14 18:04:43,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:04:43,309 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 153 transitions. [2020-10-14 18:04:43,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 18:04:43,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:43,310 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:43,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 18:04:43,310 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:43,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:43,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1854809901, now seen corresponding path program 2 times [2020-10-14 18:04:43,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:43,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471004845] [2020-10-14 18:04:43,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:43,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:43,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:43,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:43,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:47,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:47,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:47,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:48,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:48,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 18:04:48,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:04:48,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:04:48,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:48,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:48,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:04:48,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:48,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 18:04:48,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:48,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:48,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:48,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:48,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:48,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:48,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:48,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:48,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:48,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:48,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:48,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:48,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:48,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-14 18:04:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:48,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:48,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:48,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:48,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:48,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:04:48,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:48,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:48,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:48,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:48,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:48,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:48,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-14 18:04:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:48,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:48,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:48,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:48,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:48,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:04:48,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:48,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:48,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:48,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:48,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:48,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:04:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 18:04:48,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471004845] [2020-10-14 18:04:48,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:48,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:04:48,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129320038] [2020-10-14 18:04:48,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:04:48,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:48,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:04:48,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:04:48,583 INFO L87 Difference]: Start difference. First operand 123 states and 153 transitions. Second operand 14 states. [2020-10-14 18:04:49,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:49,132 INFO L93 Difference]: Finished difference Result 228 states and 291 transitions. [2020-10-14 18:04:49,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:04:49,133 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-14 18:04:49,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:49,135 INFO L225 Difference]: With dead ends: 228 [2020-10-14 18:04:49,136 INFO L226 Difference]: Without dead ends: 226 [2020-10-14 18:04:49,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:04:49,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-14 18:04:49,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 132. [2020-10-14 18:04:49,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-14 18:04:49,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 167 transitions. [2020-10-14 18:04:49,156 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 167 transitions. Word has length 49 [2020-10-14 18:04:49,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:49,157 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 167 transitions. [2020-10-14 18:04:49,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:04:49,157 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 167 transitions. [2020-10-14 18:04:49,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 18:04:49,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:49,158 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:49,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 18:04:49,159 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:49,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:49,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1877442155, now seen corresponding path program 1 times [2020-10-14 18:04:49,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:49,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26318182] [2020-10-14 18:04:49,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:49,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:49,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:49,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:49,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:53,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:53,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:53,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:54,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:54,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 18:04:54,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:04:54,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:04:54,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:54,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:54,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:04:54,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:54,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 18:04:54,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:54,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:54,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:54,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:54,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:54,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:54,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:54,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:54,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:54,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:54,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:54,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:54,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:54,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-14 18:04:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:54,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:54,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:54,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:54,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:54,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:54,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:54,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:54,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:54,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:54,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:54,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:54,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-14 18:04:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:54,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:54,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:54,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:54,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:54,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:54,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:54,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:54,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:54,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:54,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:54,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:04:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 18:04:54,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26318182] [2020-10-14 18:04:54,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:54,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:04:54,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986252886] [2020-10-14 18:04:54,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:04:54,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:54,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:04:54,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:04:54,384 INFO L87 Difference]: Start difference. First operand 132 states and 167 transitions. Second operand 15 states. [2020-10-14 18:04:54,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:54,887 INFO L93 Difference]: Finished difference Result 236 states and 297 transitions. [2020-10-14 18:04:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:04:54,888 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-14 18:04:54,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:54,890 INFO L225 Difference]: With dead ends: 236 [2020-10-14 18:04:54,891 INFO L226 Difference]: Without dead ends: 208 [2020-10-14 18:04:54,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:04:54,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-14 18:04:54,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 143. [2020-10-14 18:04:54,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-14 18:04:54,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 180 transitions. [2020-10-14 18:04:54,915 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 180 transitions. Word has length 49 [2020-10-14 18:04:54,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:54,915 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 180 transitions. [2020-10-14 18:04:54,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:04:54,916 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 180 transitions. [2020-10-14 18:04:54,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 18:04:54,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:54,917 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:54,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 18:04:54,917 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:54,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:54,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1874500889, now seen corresponding path program 6 times [2020-10-14 18:04:54,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:54,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460199411] [2020-10-14 18:04:54,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:54,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:54,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:54,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:56,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:56,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 18:04:56,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:04:56,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1592 [2020-10-14 18:04:56,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:56,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:56,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:04:56,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:56,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 18:04:56,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:56,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:56,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:56,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:56,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:56,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:56,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:56,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:56,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:56,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:56,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:56,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:56,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:56,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-14 18:04:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:56,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:56,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:56,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:56,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:56,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:56,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:56,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:56,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:56,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:56,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:56,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:56,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-14 18:04:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:56,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:56,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:56,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:56,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:56,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:56,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:56,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:56,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:56,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:56,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:56,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:56,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-14 18:04:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:56,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:56,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:56,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:56,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:56,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:56,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:56,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:56,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:56,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:56,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:56,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 18:04:56,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460199411] [2020-10-14 18:04:56,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:56,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:04:56,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861359017] [2020-10-14 18:04:56,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:04:56,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:56,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:04:56,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:04:56,604 INFO L87 Difference]: Start difference. First operand 143 states and 180 transitions. Second operand 11 states. [2020-10-14 18:04:56,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:56,925 INFO L93 Difference]: Finished difference Result 266 states and 337 transitions. [2020-10-14 18:04:56,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 18:04:56,925 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-14 18:04:56,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:56,928 INFO L225 Difference]: With dead ends: 266 [2020-10-14 18:04:56,928 INFO L226 Difference]: Without dead ends: 186 [2020-10-14 18:04:56,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:04:56,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-14 18:04:56,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-10-14 18:04:56,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-14 18:04:56,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 237 transitions. [2020-10-14 18:04:56,958 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 237 transitions. Word has length 52 [2020-10-14 18:04:56,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:56,959 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 237 transitions. [2020-10-14 18:04:56,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:04:56,959 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 237 transitions. [2020-10-14 18:04:56,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 18:04:56,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:56,960 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:56,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 18:04:56,961 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:56,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:56,961 INFO L82 PathProgramCache]: Analyzing trace with hash -161174740, now seen corresponding path program 3 times [2020-10-14 18:04:56,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:56,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553859663] [2020-10-14 18:04:56,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:56,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:56,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:56,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:57,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:01,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:01,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:01,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:01,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 18:05:01,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:05:01,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:05:01,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:01,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:01,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:05:01,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:05:01,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:05:01,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:02,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:05:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:02,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:02,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:02,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:05:02,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:02,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:02,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:02,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:02,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:02,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:02,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:02,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:02,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-14 18:05:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:02,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:02,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:02,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:02,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:02,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:05:02,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:02,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:02,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:02,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:02,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:02,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:02,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-14 18:05:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:02,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:02,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:02,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:02,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:02,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:05:02,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:02,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:02,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:02,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:02,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:02,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 18:05:02,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553859663] [2020-10-14 18:05:02,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:05:02,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:05:02,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068932474] [2020-10-14 18:05:02,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:05:02,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:05:02,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:05:02,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:05:02,419 INFO L87 Difference]: Start difference. First operand 186 states and 237 transitions. Second operand 16 states. [2020-10-14 18:05:02,945 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-14 18:05:03,183 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-14 18:05:03,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:05:03,376 INFO L93 Difference]: Finished difference Result 287 states and 365 transitions. [2020-10-14 18:05:03,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:05:03,377 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-14 18:05:03,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:05:03,378 INFO L225 Difference]: With dead ends: 287 [2020-10-14 18:05:03,378 INFO L226 Difference]: Without dead ends: 225 [2020-10-14 18:05:03,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:05:03,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-14 18:05:03,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 205. [2020-10-14 18:05:03,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-14 18:05:03,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 260 transitions. [2020-10-14 18:05:03,407 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 260 transitions. Word has length 52 [2020-10-14 18:05:03,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:05:03,407 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 260 transitions. [2020-10-14 18:05:03,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:05:03,408 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 260 transitions. [2020-10-14 18:05:03,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 18:05:03,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:05:03,409 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:05:03,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 18:05:03,409 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:05:03,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:05:03,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1739421040, now seen corresponding path program 4 times [2020-10-14 18:05:03,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:05:03,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464261978] [2020-10-14 18:05:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:05:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:03,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:03,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:03,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:03,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:07,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:08,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:08,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 18:05:08,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:05:08,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:05:08,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:08,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:08,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:05:08,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:05:08,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:05:08,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:08,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:05:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:08,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:08,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:08,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:05:08,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:08,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:05:08,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:08,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:08,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:08,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:08,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:08,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 18:05:08,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-14 18:05:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:08,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:08,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:08,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:08,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:08,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:08,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:08,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:08,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:08,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:08,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:08,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:08,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-14 18:05:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:08,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:08,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:08,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:08,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:08,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:05:08,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:08,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:08,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:08,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:08,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:08,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 18:05:08,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464261978] [2020-10-14 18:05:08,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:05:08,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:05:08,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330750986] [2020-10-14 18:05:08,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:05:08,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:05:08,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:05:08,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:05:08,625 INFO L87 Difference]: Start difference. First operand 205 states and 260 transitions. Second operand 16 states. [2020-10-14 18:05:09,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:05:09,207 INFO L93 Difference]: Finished difference Result 372 states and 478 transitions. [2020-10-14 18:05:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:05:09,207 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-14 18:05:09,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:05:09,209 INFO L225 Difference]: With dead ends: 372 [2020-10-14 18:05:09,209 INFO L226 Difference]: Without dead ends: 370 [2020-10-14 18:05:09,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:05:09,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-14 18:05:09,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 212. [2020-10-14 18:05:09,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-14 18:05:09,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 270 transitions. [2020-10-14 18:05:09,238 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 270 transitions. Word has length 52 [2020-10-14 18:05:09,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:05:09,239 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 270 transitions. [2020-10-14 18:05:09,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:05:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 270 transitions. [2020-10-14 18:05:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 18:05:09,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:05:09,240 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:05:09,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 18:05:09,241 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:05:09,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:05:09,241 INFO L82 PathProgramCache]: Analyzing trace with hash 2075121516, now seen corresponding path program 7 times [2020-10-14 18:05:09,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:05:09,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093290865] [2020-10-14 18:05:09,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:05:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:09,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:09,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:09,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:09,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:09,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:10,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:10,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:14,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:14,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 18:05:14,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:05:14,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:05:14,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:14,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:14,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:05:14,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:05:14,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 18:05:14,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:14,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:05:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:14,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:14,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:14,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:05:14,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:14,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:14,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:14,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:14,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:14,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:14,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:14,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:14,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-14 18:05:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:14,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:14,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:14,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:14,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:14,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:05:14,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:14,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:14,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:14,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:14,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:14,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:14,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-14 18:05:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:14,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:14,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:14,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:14,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:14,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:05:14,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:14,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:14,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:14,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:14,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:14,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:14,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-14 18:05:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:14,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:14,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:14,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:14,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:14,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:05:14,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:14,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:14,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:14,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:14,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:14,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:05:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 18:05:14,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093290865] [2020-10-14 18:05:14,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:05:14,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:05:14,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021419082] [2020-10-14 18:05:14,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:05:14,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:05:14,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:05:14,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:05:14,512 INFO L87 Difference]: Start difference. First operand 212 states and 270 transitions. Second operand 16 states. [2020-10-14 18:05:15,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:05:15,504 INFO L93 Difference]: Finished difference Result 294 states and 378 transitions. [2020-10-14 18:05:15,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:05:15,505 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-10-14 18:05:15,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:05:15,507 INFO L225 Difference]: With dead ends: 294 [2020-10-14 18:05:15,507 INFO L226 Difference]: Without dead ends: 292 [2020-10-14 18:05:15,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:05:15,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-14 18:05:15,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 261. [2020-10-14 18:05:15,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-14 18:05:15,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 339 transitions. [2020-10-14 18:05:15,543 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 339 transitions. Word has length 55 [2020-10-14 18:05:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:05:15,544 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 339 transitions. [2020-10-14 18:05:15,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:05:15,544 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 339 transitions. [2020-10-14 18:05:15,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 18:05:15,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:05:15,545 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:05:15,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 18:05:15,546 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:05:15,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:05:15,546 INFO L82 PathProgramCache]: Analyzing trace with hash -2029906569, now seen corresponding path program 5 times [2020-10-14 18:05:15,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:05:15,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814667458] [2020-10-14 18:05:15,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:05:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:15,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:15,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:15,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:15,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:20,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:20,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:20,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:20,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 18:05:20,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:05:20,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:05:20,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:20,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:20,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:05:20,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:05:20,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 18:05:20,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:20,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:05:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:20,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:20,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:20,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:05:20,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:20,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:20,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:20,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:20,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:20,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:20,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:20,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:20,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 18:05:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:20,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:20,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:20,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:20,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:20,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:20,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:20,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:20,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:20,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:20,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:20,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:20,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-14 18:05:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:20,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:20,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:20,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:20,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:20,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:20,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:20,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:20,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:20,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:20,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:20,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 7 proven. 41 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-14 18:05:20,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814667458] [2020-10-14 18:05:20,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:05:20,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:05:20,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848406894] [2020-10-14 18:05:20,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:05:20,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:05:20,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:05:20,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:05:20,714 INFO L87 Difference]: Start difference. First operand 261 states and 339 transitions. Second operand 15 states. [2020-10-14 18:05:21,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:05:21,300 INFO L93 Difference]: Finished difference Result 317 states and 406 transitions. [2020-10-14 18:05:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 18:05:21,301 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-10-14 18:05:21,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:05:21,309 INFO L225 Difference]: With dead ends: 317 [2020-10-14 18:05:21,309 INFO L226 Difference]: Without dead ends: 315 [2020-10-14 18:05:21,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:05:21,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-14 18:05:21,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 280. [2020-10-14 18:05:21,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-14 18:05:21,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 362 transitions. [2020-10-14 18:05:21,375 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 362 transitions. Word has length 55 [2020-10-14 18:05:21,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:05:21,375 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 362 transitions. [2020-10-14 18:05:21,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:05:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 362 transitions. [2020-10-14 18:05:21,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 18:05:21,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:05:21,383 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:05:21,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 18:05:21,383 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:05:21,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:05:21,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2052538823, now seen corresponding path program 6 times [2020-10-14 18:05:21,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:05:21,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398870832] [2020-10-14 18:05:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:05:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:21,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:21,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:21,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:22,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:26,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:26,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 18:05:26,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:05:26,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:05:26,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:26,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:26,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:05:26,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:05:26,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 18:05:26,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:05:26,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:05:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:26,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:26,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:26,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:05:26,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:26,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:26,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:26,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:26,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:26,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:26,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:26,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:26,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 18:05:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:26,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:26,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:26,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:26,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:26,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:05:26,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:26,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:26,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:26,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:26,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:26,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:05:26,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-14 18:05:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:26,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:26,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:26,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:26,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:26,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:26,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:26,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:26,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:26,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:05:26,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:26,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 18:05:26,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398870832] [2020-10-14 18:05:26,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:05:26,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:05:26,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934590780] [2020-10-14 18:05:26,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:05:26,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:05:26,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:05:26,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:05:26,485 INFO L87 Difference]: Start difference. First operand 280 states and 362 transitions. Second operand 10 states. [2020-10-14 18:05:26,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:05:26,737 INFO L93 Difference]: Finished difference Result 314 states and 398 transitions. [2020-10-14 18:05:26,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:05:26,739 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-14 18:05:26,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:05:26,741 INFO L225 Difference]: With dead ends: 314 [2020-10-14 18:05:26,741 INFO L226 Difference]: Without dead ends: 286 [2020-10-14 18:05:26,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:05:26,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-14 18:05:26,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 262. [2020-10-14 18:05:26,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-14 18:05:26,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 334 transitions. [2020-10-14 18:05:26,787 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 334 transitions. Word has length 55 [2020-10-14 18:05:26,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:05:26,788 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 334 transitions. [2020-10-14 18:05:26,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:05:26,788 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 334 transitions. [2020-10-14 18:05:26,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 18:05:26,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:05:26,789 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:05:26,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 18:05:26,790 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:05:26,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:05:26,790 INFO L82 PathProgramCache]: Analyzing trace with hash 352147655, now seen corresponding path program 8 times [2020-10-14 18:05:26,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:05:26,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090516989] [2020-10-14 18:05:26,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:05:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:26,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:26,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:27,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:27,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:27,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:28,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:28,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:28,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:31,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:31,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 18:05:31,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:05:31,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:05:31,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:31,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:31,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:05:31,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:05:31,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 18:05:31,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:32,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:05:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:32,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:32,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:32,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:05:32,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:32,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:32,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:32,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:32,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:32,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:32,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:32,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:32,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-14 18:05:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:32,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:32,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:32,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:32,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:32,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:32,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:32,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:32,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:32,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:32,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:32,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:32,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-14 18:05:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:32,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:32,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:32,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:32,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:32,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:32,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:32,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:32,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:32,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:32,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:32,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:32,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-14 18:05:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:32,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:32,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:32,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:32,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:32,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:32,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:32,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:32,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:32,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:32,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:32,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 18:05:32,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090516989] [2020-10-14 18:05:32,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:05:32,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:05:32,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690821873] [2020-10-14 18:05:32,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:05:32,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:05:32,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:05:32,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:05:32,087 INFO L87 Difference]: Start difference. First operand 262 states and 334 transitions. Second operand 18 states. [2020-10-14 18:05:33,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:05:33,025 INFO L93 Difference]: Finished difference Result 318 states and 399 transitions. [2020-10-14 18:05:33,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:05:33,026 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2020-10-14 18:05:33,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:05:33,027 INFO L225 Difference]: With dead ends: 318 [2020-10-14 18:05:33,027 INFO L226 Difference]: Without dead ends: 316 [2020-10-14 18:05:33,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:05:33,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-14 18:05:33,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 274. [2020-10-14 18:05:33,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-14 18:05:33,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 349 transitions. [2020-10-14 18:05:33,075 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 349 transitions. Word has length 58 [2020-10-14 18:05:33,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:05:33,076 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 349 transitions. [2020-10-14 18:05:33,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:05:33,076 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 349 transitions. [2020-10-14 18:05:33,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 18:05:33,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:05:33,077 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:05:33,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 18:05:33,078 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:05:33,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:05:33,078 INFO L82 PathProgramCache]: Analyzing trace with hash -769290905, now seen corresponding path program 7 times [2020-10-14 18:05:33,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:05:33,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215678561] [2020-10-14 18:05:33,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:05:33,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:33,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:33,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:33,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:33,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:36,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:38,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:38,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 18:05:38,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:05:38,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:05:38,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:38,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:38,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:05:38,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-14 18:05:38,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:05:38,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:38,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:05:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:38,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:38,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:38,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:05:38,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:38,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:38,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:38,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:38,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:38,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:38,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:38,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:38,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-14 18:05:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:38,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:38,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:38,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:38,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:38,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:38,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:38,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:38,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:38,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:38,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:38,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:38,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-14 18:05:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:38,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:38,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:38,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:38,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:38,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:38,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:38,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:38,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:38,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:38,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:38,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:38,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-14 18:05:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:38,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:38,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:38,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:38,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:38,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:38,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:38,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:38,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:38,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:38,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:38,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-14 18:05:38,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215678561] [2020-10-14 18:05:38,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:05:38,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:05:38,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433903174] [2020-10-14 18:05:38,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:05:38,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:05:38,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:05:38,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:05:38,163 INFO L87 Difference]: Start difference. First operand 274 states and 349 transitions. Second operand 9 states. [2020-10-14 18:05:38,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:05:38,376 INFO L93 Difference]: Finished difference Result 312 states and 389 transitions. [2020-10-14 18:05:38,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:05:38,377 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-14 18:05:38,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:05:38,378 INFO L225 Difference]: With dead ends: 312 [2020-10-14 18:05:38,378 INFO L226 Difference]: Without dead ends: 280 [2020-10-14 18:05:38,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:05:38,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-14 18:05:38,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 254. [2020-10-14 18:05:38,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-14 18:05:38,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 321 transitions. [2020-10-14 18:05:38,424 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 321 transitions. Word has length 60 [2020-10-14 18:05:38,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:05:38,424 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 321 transitions. [2020-10-14 18:05:38,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:05:38,424 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 321 transitions. [2020-10-14 18:05:38,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 18:05:38,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:05:38,426 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:05:38,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 18:05:38,426 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:05:38,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:05:38,426 INFO L82 PathProgramCache]: Analyzing trace with hash -365638368, now seen corresponding path program 8 times [2020-10-14 18:05:38,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:05:38,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978958983] [2020-10-14 18:05:38,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:05:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:38,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:38,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:38,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:40,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:40,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:40,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:42,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:43,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:43,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 18:05:43,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:05:43,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 18:05:43,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:43,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:43,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:05:43,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:05:43,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-14 18:05:43,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:43,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:05:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:43,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:43,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:43,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:05:43,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:43,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:43,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:43,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:43,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:43,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:43,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:43,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:43,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 18:05:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:43,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:43,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:43,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:43,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:43,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:43,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:43,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:43,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:43,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:43,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:43,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:43,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 18:05:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:43,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:43,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:43,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:43,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:43,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:43,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:43,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:43,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:43,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:43,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:43,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:43,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-14 18:05:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:43,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:43,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:43,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:43,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:43,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:05:43,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:43,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:43,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:43,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:43,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:43,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 18:05:43,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978958983] [2020-10-14 18:05:43,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:05:43,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:05:43,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628547771] [2020-10-14 18:05:43,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:05:43,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:05:43,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:05:43,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:05:43,688 INFO L87 Difference]: Start difference. First operand 254 states and 321 transitions. Second operand 17 states. [2020-10-14 18:05:44,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:05:44,277 INFO L93 Difference]: Finished difference Result 410 states and 522 transitions. [2020-10-14 18:05:44,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:05:44,278 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2020-10-14 18:05:44,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:05:44,281 INFO L225 Difference]: With dead ends: 410 [2020-10-14 18:05:44,281 INFO L226 Difference]: Without dead ends: 408 [2020-10-14 18:05:44,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:05:44,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-14 18:05:44,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 283. [2020-10-14 18:05:44,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-14 18:05:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 359 transitions. [2020-10-14 18:05:44,332 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 359 transitions. Word has length 63 [2020-10-14 18:05:44,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:05:44,333 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 359 transitions. [2020-10-14 18:05:44,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:05:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 359 transitions. [2020-10-14 18:05:44,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 18:05:44,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:05:44,334 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:05:44,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 18:05:44,335 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:05:44,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:05:44,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1818644388, now seen corresponding path program 9 times [2020-10-14 18:05:44,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:05:44,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794741467] [2020-10-14 18:05:44,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:05:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:44,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:44,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:44,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:46,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:46,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:46,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:49,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:49,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 18:05:49,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:05:49,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:05:49,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:49,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:49,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:05:49,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:05:49,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 18:05:49,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:49,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:05:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:49,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:49,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:49,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:05:49,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:49,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:49,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:49,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:49,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:05:49,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 18:05:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:49,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:49,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:49,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:49,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:49,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:05:49,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:49,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:49,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:49,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:49,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:49,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:49,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 18:05:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:49,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:49,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:49,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:49,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:49,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:49,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:49,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:49,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:49,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:49,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:49,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:49,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-14 18:05:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:49,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:49,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:49,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:49,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:49,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:05:49,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:49,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:49,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:49,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:05:49,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:49,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-14 18:05:49,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794741467] [2020-10-14 18:05:49,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:05:49,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:05:49,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955401937] [2020-10-14 18:05:49,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:05:49,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:05:49,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:05:49,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:05:49,437 INFO L87 Difference]: Start difference. First operand 283 states and 359 transitions. Second operand 11 states. [2020-10-14 18:05:49,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:05:49,771 INFO L93 Difference]: Finished difference Result 338 states and 418 transitions. [2020-10-14 18:05:49,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:05:49,772 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 63 [2020-10-14 18:05:49,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:05:49,774 INFO L225 Difference]: With dead ends: 338 [2020-10-14 18:05:49,774 INFO L226 Difference]: Without dead ends: 299 [2020-10-14 18:05:49,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:05:49,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-14 18:05:49,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 283. [2020-10-14 18:05:49,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-14 18:05:49,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 354 transitions. [2020-10-14 18:05:49,823 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 354 transitions. Word has length 63 [2020-10-14 18:05:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:05:49,823 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 354 transitions. [2020-10-14 18:05:49,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:05:49,823 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 354 transitions. [2020-10-14 18:05:49,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 18:05:49,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:05:49,825 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:05:49,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 18:05:49,825 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:05:49,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:05:49,825 INFO L82 PathProgramCache]: Analyzing trace with hash 560931889, now seen corresponding path program 10 times [2020-10-14 18:05:49,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:05:49,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647663574] [2020-10-14 18:05:49,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:05:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:49,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:49,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:49,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:51,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:51,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:51,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:52,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:52,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:53,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:53,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:54,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:54,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 18:05:54,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 18:05:54,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 18:05:54,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:54,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:54,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:05:54,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:05:54,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-14 18:05:54,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:55,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:05:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:55,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:55,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:55,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:05:55,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:55,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:55,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:55,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:55,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:55,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:55,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:55,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:55,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-14 18:05:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:55,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:55,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:55,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:55,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:55,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:55,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:55,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:55,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:55,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:55,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:55,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:55,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-14 18:05:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:55,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:55,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:55,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:55,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:55,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:55,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:55,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:55,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:55,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:55,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:55,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:55,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-14 18:05:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:55,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:55,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:55,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:55,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:55,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:55,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:55,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:55,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:55,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:55,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:55,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:55,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-14 18:05:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:55,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:55,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:55,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:55,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:55,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:55,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:55,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:55,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:05:55,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:55,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:05:55,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 18:05:55,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647663574] [2020-10-14 18:05:55,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:05:55,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:05:55,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097372566] [2020-10-14 18:05:55,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:05:55,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:05:55,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:05:55,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:05:55,059 INFO L87 Difference]: Start difference. First operand 283 states and 354 transitions. Second operand 16 states. [2020-10-14 18:05:55,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:05:55,645 INFO L93 Difference]: Finished difference Result 352 states and 439 transitions. [2020-10-14 18:05:55,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:05:55,646 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-10-14 18:05:55,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:05:55,648 INFO L225 Difference]: With dead ends: 352 [2020-10-14 18:05:55,648 INFO L226 Difference]: Without dead ends: 298 [2020-10-14 18:05:55,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:05:55,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-14 18:05:55,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 289. [2020-10-14 18:05:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-14 18:05:55,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 361 transitions. [2020-10-14 18:05:55,697 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 361 transitions. Word has length 65 [2020-10-14 18:05:55,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:05:55,698 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 361 transitions. [2020-10-14 18:05:55,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:05:55,698 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 361 transitions. [2020-10-14 18:05:55,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 18:05:55,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:05:55,699 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:05:55,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 18:05:55,700 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:05:55,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:05:55,700 INFO L82 PathProgramCache]: Analyzing trace with hash 850573166, now seen corresponding path program 9 times [2020-10-14 18:05:55,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:05:55,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448932694] [2020-10-14 18:05:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:05:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:55,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:55,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:55,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:56,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:56,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:56,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:56,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:00,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:00,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 18:06:00,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:06:00,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:06:00,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:00,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:00,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:06:00,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:06:00,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 18:06:00,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:00,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:06:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:00,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:00,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:00,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:06:00,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:00,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:00,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:00,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:00,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:00,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:00,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:00,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:00,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-14 18:06:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:00,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:00,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:00,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:00,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:00,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:00,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:00,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:00,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:00,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:00,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:00,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:00,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-14 18:06:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:00,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:00,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:00,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:00,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:00,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:00,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:00,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:00,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:00,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:00,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:00,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:00,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-14 18:06:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:00,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:00,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:00,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:00,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:00,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:00,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:00,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:00,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:00,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:00,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:00,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:00,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-14 18:06:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:00,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:00,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:00,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:00,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:00,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:00,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:00,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:00,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:00,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:00,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:00,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 20 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-14 18:06:01,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448932694] [2020-10-14 18:06:01,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:06:01,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:06:01,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862986270] [2020-10-14 18:06:01,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:06:01,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:06:01,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:06:01,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:06:01,005 INFO L87 Difference]: Start difference. First operand 289 states and 361 transitions. Second operand 18 states. [2020-10-14 18:06:02,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:06:02,506 INFO L93 Difference]: Finished difference Result 423 states and 531 transitions. [2020-10-14 18:06:02,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 18:06:02,507 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2020-10-14 18:06:02,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:06:02,510 INFO L225 Difference]: With dead ends: 423 [2020-10-14 18:06:02,511 INFO L226 Difference]: Without dead ends: 421 [2020-10-14 18:06:02,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=1079, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:06:02,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-10-14 18:06:02,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 337. [2020-10-14 18:06:02,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-14 18:06:02,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 426 transitions. [2020-10-14 18:06:02,576 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 426 transitions. Word has length 66 [2020-10-14 18:06:02,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:06:02,577 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 426 transitions. [2020-10-14 18:06:02,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:06:02,577 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 426 transitions. [2020-10-14 18:06:02,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 18:06:02,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:06:02,579 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:06:02,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 18:06:02,580 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:06:02,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:06:02,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1132225970, now seen corresponding path program 11 times [2020-10-14 18:06:02,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:06:02,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025805842] [2020-10-14 18:06:02,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:06:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:02,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:02,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:02,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:04,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:04,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:04,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:05,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:06,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:06,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:07,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:07,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 18:06:07,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 18:06:07,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:06:07,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:07,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:07,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:06:07,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:06:07,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 18:06:07,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:07,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:06:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:07,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:07,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:07,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:06:07,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:07,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:07,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:07,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:07,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:07,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:07,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:07,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:07,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-14 18:06:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:07,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:07,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:07,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:07,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:07,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:07,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:07,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:07,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:07,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:07,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:07,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:06:07,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-14 18:06:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:07,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:07,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:07,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:07,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:07,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:07,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:07,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:07,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:07,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:07,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:07,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:07,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-14 18:06:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:07,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:07,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:07,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:07,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:07,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:07,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:07,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:07,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:07,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:07,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:07,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:07,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-14 18:06:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:07,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:07,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:07,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:07,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:07,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:07,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:07,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:07,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:07,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:07,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:07,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 18:06:07,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025805842] [2020-10-14 18:06:07,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:06:07,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:06:07,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307247036] [2020-10-14 18:06:07,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:06:07,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:06:07,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:06:07,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:06:07,824 INFO L87 Difference]: Start difference. First operand 337 states and 426 transitions. Second operand 16 states. [2020-10-14 18:06:08,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:06:08,811 INFO L93 Difference]: Finished difference Result 537 states and 681 transitions. [2020-10-14 18:06:08,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:06:08,812 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-10-14 18:06:08,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:06:08,814 INFO L225 Difference]: With dead ends: 537 [2020-10-14 18:06:08,814 INFO L226 Difference]: Without dead ends: 439 [2020-10-14 18:06:08,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:06:08,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-10-14 18:06:08,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 393. [2020-10-14 18:06:08,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-10-14 18:06:08,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 498 transitions. [2020-10-14 18:06:08,872 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 498 transitions. Word has length 68 [2020-10-14 18:06:08,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:06:08,872 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 498 transitions. [2020-10-14 18:06:08,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:06:08,872 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 498 transitions. [2020-10-14 18:06:08,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 18:06:08,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:06:08,875 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:06:08,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 18:06:08,875 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:06:08,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:06:08,875 INFO L82 PathProgramCache]: Analyzing trace with hash -138387661, now seen corresponding path program 10 times [2020-10-14 18:06:08,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:06:08,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785403972] [2020-10-14 18:06:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:06:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:08,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:08,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:09,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:09,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:10,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:10,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:10,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:10,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:13,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:13,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 18:06:13,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:06:13,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:06:13,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:13,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:13,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:06:13,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:06:13,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-14 18:06:13,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:14,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:06:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:14,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:14,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:14,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:06:14,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:14,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:14,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:14,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:14,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:14,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:14,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:14,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:14,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 18:06:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:14,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:14,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:14,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:14,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:14,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:06:14,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:14,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:14,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:14,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:14,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:14,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:14,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 18:06:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:14,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:14,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:14,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:14,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:14,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:06:14,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:14,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:14,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:14,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:14,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:14,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:14,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-14 18:06:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:14,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:14,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:14,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:14,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:14,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:14,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:14,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:14,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:14,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:14,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:14,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:06:14,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-14 18:06:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:14,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:14,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:14,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:14,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:14,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:14,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:14,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:14,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:14,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:14,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:14,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 9 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-14 18:06:14,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785403972] [2020-10-14 18:06:14,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:06:14,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:06:14,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28166610] [2020-10-14 18:06:14,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:06:14,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:06:14,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:06:14,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:06:14,247 INFO L87 Difference]: Start difference. First operand 393 states and 498 transitions. Second operand 20 states. [2020-10-14 18:06:15,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:06:15,614 INFO L93 Difference]: Finished difference Result 467 states and 586 transitions. [2020-10-14 18:06:15,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:06:15,615 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 69 [2020-10-14 18:06:15,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:06:15,618 INFO L225 Difference]: With dead ends: 467 [2020-10-14 18:06:15,618 INFO L226 Difference]: Without dead ends: 465 [2020-10-14 18:06:15,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:06:15,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-14 18:06:15,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 405. [2020-10-14 18:06:15,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-10-14 18:06:15,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 513 transitions. [2020-10-14 18:06:15,705 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 513 transitions. Word has length 69 [2020-10-14 18:06:15,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:06:15,705 INFO L479 AbstractCegarLoop]: Abstraction has 405 states and 513 transitions. [2020-10-14 18:06:15,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:06:15,706 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 513 transitions. [2020-10-14 18:06:15,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 18:06:15,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:06:15,708 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:06:15,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 18:06:15,709 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:06:15,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:06:15,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1360591923, now seen corresponding path program 12 times [2020-10-14 18:06:15,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:06:15,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280863307] [2020-10-14 18:06:15,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:06:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:15,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:15,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:15,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:17,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:18,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:18,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:19,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:19,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:19,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:20,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:20,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:20,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 18:06:20,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 18:06:20,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:06:20,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:20,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:20,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:06:20,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:06:20,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 18:06:20,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:20,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:06:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:20,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:20,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:20,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:06:20,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:20,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:20,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:20,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:20,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:20,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:20,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:20,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:20,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 18:06:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:20,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:20,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:20,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:20,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:20,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:20,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:20,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:20,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:20,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:20,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:20,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:20,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 18:06:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:20,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:20,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:20,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:20,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:20,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:20,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:20,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:20,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:20,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:20,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:20,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:20,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-14 18:06:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:20,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:20,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:20,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:20,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:20,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:20,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:20,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:20,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:20,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:20,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:20,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:20,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-14 18:06:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:20,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:20,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:20,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:20,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:20,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:20,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:20,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:20,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:20,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:20,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:20,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-14 18:06:20,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280863307] [2020-10-14 18:06:20,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:06:20,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:06:20,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672254900] [2020-10-14 18:06:20,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:06:20,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:06:20,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:06:20,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:06:20,996 INFO L87 Difference]: Start difference. First operand 405 states and 513 transitions. Second operand 17 states. [2020-10-14 18:06:21,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:06:21,640 INFO L93 Difference]: Finished difference Result 416 states and 523 transitions. [2020-10-14 18:06:21,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:06:21,640 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-10-14 18:06:21,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:06:21,642 INFO L225 Difference]: With dead ends: 416 [2020-10-14 18:06:21,643 INFO L226 Difference]: Without dead ends: 358 [2020-10-14 18:06:21,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:06:21,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-14 18:06:21,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 330. [2020-10-14 18:06:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-14 18:06:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 418 transitions. [2020-10-14 18:06:21,693 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 418 transitions. Word has length 71 [2020-10-14 18:06:21,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:06:21,693 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 418 transitions. [2020-10-14 18:06:21,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:06:21,693 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 418 transitions. [2020-10-14 18:06:21,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 18:06:21,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:06:21,695 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:06:21,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 18:06:21,696 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:06:21,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:06:21,696 INFO L82 PathProgramCache]: Analyzing trace with hash -26284989, now seen corresponding path program 13 times [2020-10-14 18:06:21,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:06:21,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928017179] [2020-10-14 18:06:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:06:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:21,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:21,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:21,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:24,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:24,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:24,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:24,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:24,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:26,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:26,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 18:06:26,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:06:26,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:06:26,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:26,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:26,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:06:26,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:06:26,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 18:06:26,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:26,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:06:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:26,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:26,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:26,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:06:26,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:26,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:06:26,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:26,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:26,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:26,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:26,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:26,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:26,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 18:06:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:26,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:26,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:26,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:26,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:26,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:26,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:26,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:26,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:26,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:26,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:26,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:26,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 18:06:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:26,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:26,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:26,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:26,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:26,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:26,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:26,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:26,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:26,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:26,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:26,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:26,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-14 18:06:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:26,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:26,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:26,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:26,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:26,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:26,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:26,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:26,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:26,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:26,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:26,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:26,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-14 18:06:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:26,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:26,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:26,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:26,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:26,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:26,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:26,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:26,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:26,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:26,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:26,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:26,931 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-14 18:06:26,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928017179] [2020-10-14 18:06:26,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:06:26,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:06:26,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741665625] [2020-10-14 18:06:26,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:06:26,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:06:26,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:06:26,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:06:26,932 INFO L87 Difference]: Start difference. First operand 330 states and 418 transitions. Second operand 16 states. [2020-10-14 18:06:27,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:06:27,468 INFO L93 Difference]: Finished difference Result 465 states and 595 transitions. [2020-10-14 18:06:27,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:06:27,468 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-10-14 18:06:27,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:06:27,471 INFO L225 Difference]: With dead ends: 465 [2020-10-14 18:06:27,472 INFO L226 Difference]: Without dead ends: 463 [2020-10-14 18:06:27,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:06:27,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-10-14 18:06:27,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 223. [2020-10-14 18:06:27,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-14 18:06:27,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 270 transitions. [2020-10-14 18:06:27,504 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 270 transitions. Word has length 71 [2020-10-14 18:06:27,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:06:27,504 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 270 transitions. [2020-10-14 18:06:27,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:06:27,505 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 270 transitions. [2020-10-14 18:06:27,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 18:06:27,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:06:27,506 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:06:27,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 18:06:27,506 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:06:27,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:06:27,507 INFO L82 PathProgramCache]: Analyzing trace with hash 769100143, now seen corresponding path program 14 times [2020-10-14 18:06:27,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:06:27,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174929130] [2020-10-14 18:06:27,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:06:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:27,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:27,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:27,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:29,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:29,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:30,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:30,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:30,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:32,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:32,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 18:06:32,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:06:32,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:06:32,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:32,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:32,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:06:32,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 18:06:32,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 18:06:32,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:32,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:06:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:32,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:32,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:32,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:06:32,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:32,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:32,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:32,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:32,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:32,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:32,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:32,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:32,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-14 18:06:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:32,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:32,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:32,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:32,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:32,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:32,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:32,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:32,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:32,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:32,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:32,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:32,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-14 18:06:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:32,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:32,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:32,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:32,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:32,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:32,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:32,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:32,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:32,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-14 18:06:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:32,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:32,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:32,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:32,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:32,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:32,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:32,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:32,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:32,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:32,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:32,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:32,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-14 18:06:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:32,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:32,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:32,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:32,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:32,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:32,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:32,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:32,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:32,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:32,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:32,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:32,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-14 18:06:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:32,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:32,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:32,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:32,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:32,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:32,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:32,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:32,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:32,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:32,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:32,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-14 18:06:32,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174929130] [2020-10-14 18:06:32,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:06:32,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:06:32,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231310201] [2020-10-14 18:06:32,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:06:32,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:06:32,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:06:32,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:06:32,820 INFO L87 Difference]: Start difference. First operand 223 states and 270 transitions. Second operand 17 states. [2020-10-14 18:06:33,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:06:33,985 INFO L93 Difference]: Finished difference Result 393 states and 487 transitions. [2020-10-14 18:06:33,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 18:06:33,986 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-10-14 18:06:33,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:06:33,988 INFO L225 Difference]: With dead ends: 393 [2020-10-14 18:06:33,989 INFO L226 Difference]: Without dead ends: 351 [2020-10-14 18:06:33,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:06:33,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-14 18:06:34,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 277. [2020-10-14 18:06:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-14 18:06:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 336 transitions. [2020-10-14 18:06:34,055 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 336 transitions. Word has length 76 [2020-10-14 18:06:34,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:06:34,055 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 336 transitions. [2020-10-14 18:06:34,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:06:34,056 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 336 transitions. [2020-10-14 18:06:34,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 18:06:34,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:06:34,057 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:06:34,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 18:06:34,058 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:06:34,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:06:34,058 INFO L82 PathProgramCache]: Analyzing trace with hash -2135504973, now seen corresponding path program 15 times [2020-10-14 18:06:34,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:06:34,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92375954] [2020-10-14 18:06:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:06:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:34,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:34,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:34,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:36,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:36,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:37,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:37,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:37,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:38,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:39,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:39,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 18:06:39,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 18:06:39,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 18:06:39,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:39,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:39,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:06:39,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:06:39,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 18:06:39,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:39,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:06:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:39,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:39,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:39,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:06:39,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:39,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:39,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:39,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:39,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:39,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:39,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:39,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:39,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-14 18:06:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:39,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:39,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:39,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:39,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:39,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:39,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:39,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:39,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:39,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:39,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:39,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:39,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-14 18:06:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:39,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:39,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:39,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:39,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:39,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:39,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:39,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:39,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:39,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:39,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:39,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:39,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-14 18:06:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:39,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:39,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:39,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:39,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:39,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:39,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:39,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:39,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:39,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:39,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:39,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:39,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-14 18:06:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:39,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:39,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:39,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:39,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:39,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:39,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:39,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:39,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:39,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:39,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:39,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:39,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-14 18:06:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:39,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:39,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:39,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:39,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:39,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:39,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:39,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:39,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:39,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:39,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:39,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-10-14 18:06:39,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92375954] [2020-10-14 18:06:39,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:06:39,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:06:39,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812517483] [2020-10-14 18:06:39,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:06:39,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:06:39,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:06:39,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:06:39,339 INFO L87 Difference]: Start difference. First operand 277 states and 336 transitions. Second operand 17 states. [2020-10-14 18:06:40,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:06:40,236 INFO L93 Difference]: Finished difference Result 382 states and 466 transitions. [2020-10-14 18:06:40,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:06:40,238 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-10-14 18:06:40,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:06:40,241 INFO L225 Difference]: With dead ends: 382 [2020-10-14 18:06:40,241 INFO L226 Difference]: Without dead ends: 380 [2020-10-14 18:06:40,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:06:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-14 18:06:40,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 299. [2020-10-14 18:06:40,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-14 18:06:40,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 366 transitions. [2020-10-14 18:06:40,351 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 366 transitions. Word has length 76 [2020-10-14 18:06:40,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:06:40,353 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 366 transitions. [2020-10-14 18:06:40,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:06:40,353 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 366 transitions. [2020-10-14 18:06:40,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 18:06:40,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:06:40,356 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:06:40,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 18:06:40,357 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:06:40,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:06:40,357 INFO L82 PathProgramCache]: Analyzing trace with hash -907111974, now seen corresponding path program 11 times [2020-10-14 18:06:40,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:06:40,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812063939] [2020-10-14 18:06:40,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:06:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:40,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:40,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:41,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:41,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:41,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:42,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:42,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:45,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:45,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-14 18:06:45,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:06:45,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:06:45,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:45,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:45,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:06:45,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:06:45,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-14 18:06:45,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:45,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:06:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:45,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:45,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:45,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:06:45,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:45,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:45,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:45,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:45,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:45,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:45,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:45,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:45,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 18:06:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:45,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:45,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:45,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:45,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:45,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:06:45,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:45,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:45,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:45,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:45,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:45,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:06:45,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 18:06:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:45,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:45,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:45,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:45,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:45,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:06:45,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:45,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:45,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:45,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:45,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:45,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:45,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-14 18:06:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:45,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:45,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:45,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:45,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:45,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:06:45,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:45,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:45,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:45,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:45,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:45,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:06:45,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-14 18:06:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:45,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:45,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:45,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:45,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:45,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:45,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:45,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:45,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:45,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:45,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:45,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:06:45,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-14 18:06:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:45,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:45,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:45,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:45,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:45,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:45,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:45,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:45,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:45,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:45,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:45,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 101 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-14 18:06:45,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812063939] [2020-10-14 18:06:45,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:06:45,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:06:45,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625737616] [2020-10-14 18:06:45,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:06:45,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:06:45,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:06:45,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:06:45,889 INFO L87 Difference]: Start difference. First operand 299 states and 366 transitions. Second operand 21 states. [2020-10-14 18:06:47,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:06:47,539 INFO L93 Difference]: Finished difference Result 407 states and 503 transitions. [2020-10-14 18:06:47,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:06:47,540 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 77 [2020-10-14 18:06:47,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:06:47,543 INFO L225 Difference]: With dead ends: 407 [2020-10-14 18:06:47,543 INFO L226 Difference]: Without dead ends: 405 [2020-10-14 18:06:47,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:06:47,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-10-14 18:06:47,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 345. [2020-10-14 18:06:47,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-14 18:06:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 426 transitions. [2020-10-14 18:06:47,613 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 426 transitions. Word has length 77 [2020-10-14 18:06:47,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:06:47,613 INFO L479 AbstractCegarLoop]: Abstraction has 345 states and 426 transitions. [2020-10-14 18:06:47,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:06:47,613 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 426 transitions. [2020-10-14 18:06:47,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 18:06:47,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:06:47,615 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:06:47,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 18:06:47,615 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:06:47,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:06:47,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1300476554, now seen corresponding path program 16 times [2020-10-14 18:06:47,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:06:47,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368493635] [2020-10-14 18:06:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:06:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:47,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:47,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:47,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:50,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:50,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:51,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:52,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:52,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-14 18:06:52,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:06:52,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 18:06:52,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:52,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:52,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:06:52,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:06:52,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-14 18:06:52,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:52,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:06:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:52,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:52,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:52,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:06:52,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:52,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:52,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:52,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:52,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:52,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:52,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:52,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:52,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 18:06:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:52,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:52,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:52,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:52,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:52,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:52,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:52,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:52,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:52,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:52,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:52,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:52,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 18:06:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:52,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:52,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:52,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:52,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:52,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:52,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:52,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:52,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:52,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:52,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:52,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:52,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-14 18:06:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:52,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:52,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:52,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:52,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:52,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:52,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:52,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:52,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:52,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:52,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:52,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:52,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-14 18:06:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:52,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:52,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:52,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:52,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:52,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:52,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:52,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:52,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:52,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:52,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:52,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:52,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-14 18:06:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:52,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:52,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:52,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:52,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:52,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:52,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:52,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:52,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:52,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:52,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:52,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 55 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-10-14 18:06:52,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368493635] [2020-10-14 18:06:52,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:06:52,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:06:52,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892507984] [2020-10-14 18:06:52,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:06:52,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:06:52,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:06:52,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:06:52,888 INFO L87 Difference]: Start difference. First operand 345 states and 426 transitions. Second operand 18 states. [2020-10-14 18:06:53,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:06:53,605 INFO L93 Difference]: Finished difference Result 406 states and 497 transitions. [2020-10-14 18:06:53,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:06:53,606 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-10-14 18:06:53,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:06:53,609 INFO L225 Difference]: With dead ends: 406 [2020-10-14 18:06:53,609 INFO L226 Difference]: Without dead ends: 404 [2020-10-14 18:06:53,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:06:53,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-14 18:06:53,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 300. [2020-10-14 18:06:53,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-10-14 18:06:53,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 366 transitions. [2020-10-14 18:06:53,672 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 366 transitions. Word has length 79 [2020-10-14 18:06:53,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:06:53,672 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 366 transitions. [2020-10-14 18:06:53,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:06:53,672 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 366 transitions. [2020-10-14 18:06:53,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 18:06:53,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:06:53,674 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:06:53,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 18:06:53,674 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:06:53,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:06:53,675 INFO L82 PathProgramCache]: Analyzing trace with hash -568509128, now seen corresponding path program 17 times [2020-10-14 18:06:53,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:06:53,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085652846] [2020-10-14 18:06:53,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:06:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:53,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:53,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:53,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:57,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:57,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:57,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:58,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:58,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:58,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:58,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-14 18:06:58,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:06:58,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-14 18:06:58,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:58,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:58,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:06:58,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:06:58,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-14 18:06:58,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:06:58,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:06:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:58,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:58,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:58,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:06:58,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:58,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:58,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:58,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:58,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:58,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:58,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:58,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:58,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 18:06:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:58,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:58,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:58,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:58,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:58,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:58,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:58,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:58,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:58,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:58,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:58,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:58,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 18:06:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:58,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:58,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:58,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:58,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:58,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:58,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:58,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:58,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:58,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:58,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:58,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:58,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-14 18:06:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:58,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:58,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:58,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:58,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:58,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:58,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:58,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:58,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:58,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:58,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:58,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:58,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-14 18:06:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:58,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:58,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:58,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:58,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:58,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:58,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:58,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:58,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:58,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:58,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:58,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:58,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-14 18:06:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:58,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:58,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:58,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:58,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:58,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:58,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:58,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:58,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:06:58,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:58,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:06:58,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:59,005 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-10-14 18:06:59,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085652846] [2020-10-14 18:06:59,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:06:59,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:06:59,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875389532] [2020-10-14 18:06:59,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:06:59,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:06:59,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:06:59,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:06:59,006 INFO L87 Difference]: Start difference. First operand 300 states and 366 transitions. Second operand 18 states. [2020-10-14 18:06:59,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:06:59,697 INFO L93 Difference]: Finished difference Result 316 states and 382 transitions. [2020-10-14 18:06:59,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:06:59,698 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-10-14 18:06:59,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:06:59,700 INFO L225 Difference]: With dead ends: 316 [2020-10-14 18:06:59,700 INFO L226 Difference]: Without dead ends: 314 [2020-10-14 18:06:59,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:06:59,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-14 18:06:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 237. [2020-10-14 18:06:59,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-14 18:06:59,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 287 transitions. [2020-10-14 18:06:59,755 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 287 transitions. Word has length 79 [2020-10-14 18:06:59,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:06:59,756 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 287 transitions. [2020-10-14 18:06:59,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:06:59,756 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 287 transitions. [2020-10-14 18:06:59,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 18:06:59,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:06:59,758 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:06:59,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 18:06:59,759 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:06:59,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:06:59,759 INFO L82 PathProgramCache]: Analyzing trace with hash 425118965, now seen corresponding path program 12 times [2020-10-14 18:06:59,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:06:59,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210728752] [2020-10-14 18:06:59,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:06:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:59,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:59,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:00,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:00,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:01,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:01,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:01,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:04,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:07:04,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 18:07:04,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:07:04,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:07:04,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:07:04,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:07:04,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:07:04,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:07:04,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 18:07:04,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:07:05,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:07:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:07:05,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:05,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:07:05,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:07:05,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:07:05,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:07:05,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:07:05,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:07:05,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:07:05,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:07:05,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:07:05,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:07:05,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-14 18:07:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:07:05,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:05,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:07:05,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:07:05,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:07:05,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:07:05,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:07:05,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:07:05,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:07:05,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:07:05,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:07:05,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:07:05,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-14 18:07:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:07:05,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:05,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:07:05,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:07:05,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:07:05,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:07:05,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:07:05,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:07:05,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:07:05,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:07:05,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:07:05,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:07:05,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-14 18:07:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:07:05,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:05,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:07:05,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:07:05,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:07:05,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:07:05,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:07:05,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:07:05,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:07:05,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:07:05,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:07:05,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:07:05,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-14 18:07:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:07:05,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:05,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:07:05,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:07:05,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:07:05,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:07:05,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:07:05,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:07:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:07:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:07:05,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:07:05,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:07:05,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-14 18:07:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:07:05,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:05,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:07:05,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:07:05,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:07:05,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:07:05,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:07:05,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:07:05,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:07:05,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:07:05,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:07:05,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:07:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 11 proven. 119 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-14 18:07:05,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210728752] [2020-10-14 18:07:05,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:07:05,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:07:05,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887566415] [2020-10-14 18:07:05,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:07:05,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:07:05,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:07:05,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:07:05,332 INFO L87 Difference]: Start difference. First operand 237 states and 287 transitions. Second operand 22 states. [2020-10-14 18:07:07,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:07:07,106 INFO L93 Difference]: Finished difference Result 300 states and 364 transitions. [2020-10-14 18:07:07,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:07:07,107 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 80 [2020-10-14 18:07:07,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:07:07,110 INFO L225 Difference]: With dead ends: 300 [2020-10-14 18:07:07,110 INFO L226 Difference]: Without dead ends: 298 [2020-10-14 18:07:07,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:07:07,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-14 18:07:07,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 199. [2020-10-14 18:07:07,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-14 18:07:07,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 236 transitions. [2020-10-14 18:07:07,150 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 236 transitions. Word has length 80 [2020-10-14 18:07:07,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:07:07,150 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 236 transitions. [2020-10-14 18:07:07,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:07:07,151 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 236 transitions. [2020-10-14 18:07:07,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 18:07:07,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:07:07,152 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:07:07,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 18:07:07,152 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:07:07,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:07:07,152 INFO L82 PathProgramCache]: Analyzing trace with hash 646607590, now seen corresponding path program 18 times [2020-10-14 18:07:07,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:07:07,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381296614] [2020-10-14 18:07:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:07:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:07:07,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:07,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:07,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking...